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Tutors Answer Your Questions about Permutations (FREE)
Question 220713: HI!! i need help with this question..
You draw one card 52-card deck. The card is replaced and the deck and the deck is reshuffled, then you draw a second card. Find the probability of drawing jack the first time and a club the second time.
thank you for your help!!!
Click here to see answer by tutor_paul(424)   |
Question 220739: A game is played using one die. If the dir is rolled and shows 1, the player wins $1. If the die is rolled and shows 2, the player wins $2, if the die is rolled and shows 3 the player wins $3. If the die shows 4, 5, 6 the player wins nothing. There is a charge of $1.25 to play this game. What is the game's expected value?
thank you!
Click here to see answer by stanbon(26367)  |
Question 220992: You draw one card from a 52-card deck. The card is replaced and the deck is reshuffled, then you draw a second card. Find the probability of drawing a jack the first time and a club the second time.
Click here to see answer by drj(1380)  |
Question 221650: This problem stumps me..can u please explain how to work it??
The producer of All Things Considered, a radio-news program on NPR, has 4 in-depth and 8 short news stories for broadcast during the next two hours. The producer must arrange the in-depth and short stories by starting with an in-depth story followed by two short stories, and then another in-depth story and two short stories until all 12 stories have been aired. How many arrangements for the broadcast are possible?
Click here to see answer by stanbon(26367) |
Question 222300: Hello,
I'm good with solving direct and inverse but they threw in direct and inverse and I'm not quite sure how to treat this problem. Is it two problems?
Suppose z varies directly as the square of x and inversely as y. If z=8 when x=4 and y=6, find z when x=6 and y=12.
Thank you
Click here to see answer by solver91311(5106)  |
Question 223125: Playing deck of 52 cards. Select a card from the deck. What is the probability that the card will not be a face card? i have 40/52. 12 face cards minus the 12 face cards. am i close? if not could you explain how to get this answer. thanks ever so much.
Click here to see answer by Edwin McCravy(2938) |
Question 223863: To make an A in Mrs. Boudreauxs class, a student must have an average of at least 90 on all five tests. Andy has made grades of 91, 83, 89, 92 on the first four tests. What must he make on the fifth test in order to get an A in Mrs. Boudreaux's class?
Click here to see answer by rfer(2696) |
Question 227480: Mr. Wu’s biology class is writing group reports about
the Hawaiian Islands. He has a total of 10 groups.
Mr. Wu will assign an island and a topic at random
to each of the groups. No two group assignments will
be the same.
Five Islands: Hawaii, Maui, Lanai, Oahu,
or Kauai
Topics: Plant Life or
Animal Life
Linda and Kim are in different groups, but they both
want to write about Kauai. What is the probability
that both Linda’s and Kim’s groups will receive Kauai
assignments?
A.1/5
B.1/45
C.1/50
D.1/90
Click here to see answer by edjones(3330)  |
Question 227895: Social Security numbers are in the form ###-##-####, where each symbol represents any number 0-9. How many Social Security numbers are possible using this format? Will we ever run out of Social Security numbers?
Would it be 90 factorial? Thank you.
Jim
Click here to see answer by Alan3354(6153)  |
Question 228487: There are 12 questions on an examination and each student must answer 8 questions including at least 4 of the first 5 questions. How many different combinations of questions could a student choose to answer?
Click here to see answer by stanbon(26367) |
Question 229101: How many combinations of three digits can be made from the numbers 0-9 without repetitions?
Please correct my answer if its wrong.
n=10
r=3
nPr=(n!)/(n-r)!
= (10!)/(10-3)!
= (3,628,800)/ (7)!
= (3,628,800)/5040
= 720
Click here to see answer by stanbon(26367) |
Question 231962: My teacher and I cannot figure this out. Please help us.
A lodge has 50 members of whom six are physicians. In how many ways can you choose a committe of 10 that the committe contains at least three physicians?
Click here to see answer by scott8148(3400)  |
Question 232096: The number of people on the school board is represented by x. Two subcommittees with an equal number of members are formed, one with (2/3)x – 5 members and the other with (x/4) members. How many people are on the school board?
Click here to see answer by checkley77(7172) |
Question 232654: I am going to ask four questions. My questions are on the counting method, I have a test on it very soon and if you guys could anwser and explain asap that would be great :)
1. Jeff Hubbard, a contractor. builds homes of eight diffrent models and presently has five lots to build on. In how many diffrent ways can he arrange homes on these lots?Assume five diffrent models will be built.
2. The ten longest broadway run includes the phantom of the opera and les miserables.Four of teh ten are chosen randomly. ( assume order is not important)
(a) how many ways can the four be chosen?
(b) How many of those groups of four would include niether of the two productions mentioned?
(c)How many of them would include atleast one of the productions mentioned?
3.Judy zahrndt wants to name her new baby so that his monogram(first.middle, and last initials) will be distinct letters in alphabetical order and he will share her last name. How many diffrent moograms should she select?
Click here to see answer by stanbon(26367) |
Question 233437: 16) In how many ways can 7 people be chosen and arranged in a straight line, if there are 9 people from whom to choose? 16) ______
A) 72 ways B) 63 ways
C) 144 ways D) 181,440 ways
*****AM I USING PERMUTATION, COMBINATIONS or is it 9*7=63?******
Click here to see answer by Theo(691)  |
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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
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