Tutors Answer Your Questions about Probability-and-statistics (FREE)
Question 31598: A box contains 2 fifty paise coins,5 twenty five paise coins and a certain fixed number(N<=2) of ten and five paise
coins.If five coins are taken out of the box at random,then the probability that the total value of these 5 coins is
less than one rupee and fifty paise is which of the following:-
A.10*(N+2)/(N+7C5)
B.1-(10*(N+2)/(N+7C5))
C.5(N+3)/(N+5C2)
D.1-(5*(N+3)/(N+5C2))
Click here to see answer by venugopalramana(3286)   |
Question 33819: There are two boxes A and B.
Box A contains balls numbered 1 through 9.
Box B contains balls numbered 1 through 5.
A box is chosen at random,and a ball is picked up from the box.
If the ball has odd number,then the next ball is picked up from the same box.
Else
If the ball has even number,then the next ball is picked up from the other box.
Thus two balls are selected.
What is the probablility that both balls have even numbers.?.
Click here to see answer by venugopalramana(3286) |
Question 31729: A box contains 2 fifty paise coins,5 twenty five paise coins and a certain fixed number(N<=2) of ten and five paise
coins.If five coins are taken out of the box at random,then the probability that the total value of these 5 coins is
less than one rupee and fifty paise is which of the following:-
A.10*(N+2)/(N+7C5)
B.1-(10*(N+2)/(N+7C5))
C.5(N+3)/(N+5C2)
D.1-(5*(N+3)/(N+5C2))
Click here to see answer by venugopalramana(3286) |
Question 34415: Paul orders a pizza. Chef carl randomly chooses 2 different toppings to put on the pizza from the following: pepperoni, onion, sausage, mushrooms, and anchovies. if paul will not eat pizza with mushrooms, determine the probability that paul will not eat the pizza chef carl has made.
Click here to see answer by usyim88hk(157)  |
Question 34448: In the Junior Class the Followin statistics are true...
*116 students take algebra II
*99 students take Chemistry
*49 take Spanish
*15 students that take algebra II also take Chemistry
*20 students that take algebra II also take Spanish
*22 students that take Chemistry also take Spanish
*12 students take Chemistry algebra II and Spanish
*31 students take none of th three classes
How many students are in the class?
I know the answer is 250... i solved it using a venn diagram and the teacher said it was right... but he said that there is a formulaic way to solve it and is giving MAJOR bonus points if i figure it out... so PLEASE i nned it solved out mathatmatically (meaning a formula)
Click here to see answer by venugopalramana(3286) |
Question 34416: a 10 foot ladder is to be placed against the aide of a building. the base of the ladder must be placed at an anle of 72 degrees w/ the level ground for a secure footing. find, to the nearest inch, how far the base of the ladder should be from the side of the building and how far up the side of the building the ladder will reach.
Click here to see answer by hydromojo(20) |
Question 34391This question is from textbook 
: 7. Find the following Probabilities.
a. p(0
c. p(-0.87
f. p(z<1.25)
I have the question and the answer in the book, but I can not wrap my mind around the text to understand the solution. This question is from textbook
Click here to see answer by venugopalramana(3286) |
Question 32386: 1.In a shipment of 50 DVD players, 2 are defective. If 30 players are picked at random, what is the probability that none is defcetive?
2.A shop has 12 flavours of lollipop. The shopkeeper sells the lollipops in packets of three, each packet containing 3 flavours. How many different packets are possible?
3. If 2 cards are drawn at random from a regular deck of 52 cards without replacement, what is the probability that both cvards are aces
Click here to see answer by stanbon(26259) |
Question 31692: Joe's wallet contains three $1 bills, four $5 bills, and two $10 bills.
A. If he selects three bills in successions, find the probability of selecting a $5 first then two $10 bills if the bills are not replaced?
B. How would the probability be different if the bills were replaced before the next bill is selected?
Click here to see answer by stanbon(26259) |
Question 25143: A university test was given where the scores are normally distributed. A student had a score of 61% which was 2.45 standard deviations from the mean. If the mean of the exam scores was 54%, then what was the standard deviation of the exam scores?
And I would like to say thank you to everybody who answered all my problems in the past and to the person who solves this question.
Click here to see answer by stanbon(26259) |
Question 24754: zccording to the national center fo health statistics, each time a baby is born, the probability that it is a boy is always 51.3 % and a girl is 48.7% regardless of the sex of any previous births in the family. suppose a couple has four children.. What is the probability they are girls?? what is the probability there are one girl and three boys?
Click here to see answer by stanbon(26259) |
Question 34609This question is from textbook 
: 3) Use the geometric sequence of numbers 1, 1/2, 1/4, 1/8,…to find the following:
a) What is r, the ratio between 2 consecutive terms?
Answer: 1/2
Show work in this space. r=(1/2/1=1/4/1/2)
r=1/2
b) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 10 terms? Please round your answer to 4 decimals.
Answer:
Show work in this space.
c) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 12 terms? Please round your answer to 4 decimals.
Answer:
Show work in this space.
d) What observation can make about these sums? In particular, what number does it appear that the sum will always be smaller than?
Answer:
This question is from textbook
Click here to see answer by stanbon(26259) |
Question 33105: 1)There are two bags A and B.
A has tickets numbered 1,2,3,4,5,6,7,8,9
B has tickets numbered 1,2,3,4,5
A ticket is drawn randomly from one of the two bags.
If the ticket number is odd then the next ticket is drawn from the other bag.
If the ticket number is even then the next ticket is drawn from the same bag.
What is the probability that both tickets will be numbered even?
Click here to see answer by stanbon(26259) |
Question 23901: Here is my question please help...
A research study on the calorie intake of 2300 women found that the mean calorie intake was 1650 calories per day. The data were normally distributed with a standard deviation of 175 calories. How many women in the study at between 1300 and 2000 calories a day?
Thats all i have no idea how to find the anwser so some help would be nice. Thanks
Click here to see answer by stanbon(26259) |
Question 34900: Can anyone please help me solve this? THank you so very much!
Use the fundamental counting principle to solve
Next semester you are going to take one science class, one math class, one history class, and one English class. Accoridng to the schedule, you have 4 different science classes, 3 different math classes, 2 different history classes, and 3 different Englsih classes to choose from. Assuming no schedule conflicts, how many different 4-course selections can you make?
Click here to see answer by checkley71(8405) |
Question 34901: I need help please!!!
Thank you!
Use the fundamental coutning principle to solve
You are taking a test that has 5 True/False questions. If you answer each question with true or false and leave none of them blank, in how many ways can you answer the whole test?
Click here to see answer by stanbon(26259) |
Question 34902: I would appreciate the kindness of your help. Thank you!
Use the fundamental counting principle to solve.
A company places a 6-symbol code on each unit of product. The code consists of 4 digits, the first of which is number 5, followed by two letters, the first of which is NOT a vowel. How many different codes are possible?
Click here to see answer by stanbon(26259) |
Question 34902: I would appreciate the kindness of your help. Thank you!
Use the fundamental counting principle to solve.
A company places a 6-symbol code on each unit of product. The code consists of 4 digits, the first of which is number 5, followed by two letters, the first of which is NOT a vowel. How many different codes are possible?
Click here to see answer by checkley71(8405) |
Question 34915: MUST USE THE FORMULA FOR COMBINATIONS TO SOLVE THE FOLLOWING PROBLEM. MUST SHOW ALL WORK.
The class president plans to randomly select a committee of 3 people from 25 students. How many committees are possible?
Thank you for taking the time to help me out! Please help me I have done over 40 of these and I am confused on a few.
Click here to see answer by Earlsdon(4898) |
Question 34908: MUST SOLVE USING PERMUTATIONS
A committee has 15 members and needs to choose 3 people to complete specific tasks to prepare for a car wash. One needs to fund a location, another needs to arrange the publicity, and the third person needs to schedule workers. In how may different ways can 3 students be chosen and assigned a job?
Any help you may offer would be greatly appreciated! Thank you!
Click here to see answer by venugopalramana(3286) |
Question 34939: Please help me with my over 200 to do, and confused on some of them. THIS ONE IS SO CONFSUING TO ME! a hard one!!!
Solve any way, but show work.
There are 15 books on the summer reading list. Three of them are plays, one is poetry, and the rest are novels. what is the probability that you will choose 2 novels and a play in that order if you choose the books a t random?
Click here to see answer by mbarugel(146) |
Question 34936: Solve any way, but show work!
You want to have 3 servings daily of dairy products without having the same food more than once. Milk, yougurt, cottage cheese, and chedar cheese are in the refrigerator. How many different combinations can you have?
Thank you so very much and have a great day!
Click here to see answer by Earlsdon(4898) |
Question 34934: The kindness of you help with my over 200 to do, and confusion with some of them is greatly appreciated.
Solve any way but must show work.
You take 4 books out of the local library to read during spring vacation. In how many different orders can you read the books?
Click here to see answer by checkley71(8405) |
Question 34934: The kindness of you help with my over 200 to do, and confusion with some of them is greatly appreciated.
Solve any way but must show work.
You take 4 books out of the local library to read during spring vacation. In how many different orders can you read the books?
Click here to see answer by Prithwis(166)  |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860
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