Tutors Answer Your Questions about Permutations (FREE)
Question 749386: Plz some1 help me to solve this problem:
An 8 litre cylinder contains a mixture of oxygen
and nitrogen, the volume of oxygen being 16% of
the total volume. A few litres of the mixture is
released and an equal amount of nitrogen is added.
Then the same amount of the mixture as before is
released and replaced by nitrogen for the second
time. As a result, the oxygen content becomes 9% of
the total volume. How many litres of mixture is
released each time?
Click here to see answer by ankor@dixie-net.com(15622)   |
Question 749386: Plz some1 help me to solve this problem:
An 8 litre cylinder contains a mixture of oxygen
and nitrogen, the volume of oxygen being 16% of
the total volume. A few litres of the mixture is
released and an equal amount of nitrogen is added.
Then the same amount of the mixture as before is
released and replaced by nitrogen for the second
time. As a result, the oxygen content becomes 9% of
the total volume. How many litres of mixture is
released each time?
Click here to see answer by lynnlo(4155) |
Question 749388: plz help me:
Directions for Q1 to 3:
In a famous short-time game named CROSS, each player
puts a mark (O OR x) one by one inside a 3x3 grid (9 slots).
Two players face the following situation in between the
game.
A player will put his mark in a line such that:
(a) it already contains two of his own marks (for winning)
(b) it already contains two of the opponents marks (for
saving the game)
It is known that player always gives priority to Winning
over saving.
1. What could be the mark of the person who started the
game?
A) X
B) O
C) X or O
D) Data insufficient
2. The player who wins the match uses which mark?
A) X
B) O
C) X or O
D) Data insufficient
3. Probability of A (with symbol O), winning the game
if both players freely mark anywhere?
A) 0.76
B) 1
C) 0.5
D) 0.33
Click here to see answer by lynnlo(4155) |
Question 749394: Q15 In how many ways can we distribute seven apple and six oranges among 4 children so that each children receive at least one apple?
Q16 From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 men are there on the committee. In how many ways can it be done?
Q17 A committee of 7 consisting of a chairman, vice chairman, a secretary, and 4 other member is to be chosen from a class of 20 students. In how many ways can this committee be chosen?
Q18 Weave and Kline, a software development company, has received nine new user requirement regarding a new computer system. In how many ways can these new user requirements be directed to three of the company's software developers if each of the software developers has to handle three new user requirements?
Q19 A restaurant has 6 different desserts. Find the number of ways a customer can choose
a. 1 dessert
b. 2 of the desserts
Q20 Given a class of 12 girls and 10 boys
a. In how many ways can a committee of five consisting of 3 girls and 2 boys be chosen?
b. What are the possible committees of five can be chosen at random from the class, consists of three girls and two boys?
c. How many of the the possible committees of five have no boys? (i.e. consists only of girls)
Click here to see answer by lynnlo(4155) |
Question 748710: Can you please help me with this word problem?
Nikki has a collection of 32 CDs, 18 r&b, and 14 hip hop. As she is leaving for a trip, she randomly chooses 6 CDs to take with her. What is the probability that nikki selects 3 r&b and 3 hip hop cds? Answer has to be 4 decimal places!
Thank you so much!!
Click here to see answer by stanbon(57214) |
Question 747297: In Minnesota, license plates have 3 letters followed by 3 numbers or vice versa. You can repeat no more than two letters in any order. How many possible license plates are there?
Must show all work, can someone please assist me?
Click here to see answer by stanbon(57214) |
Question 163408: I need to figure out how many possible milkshake combinations there can be with 64 ingredients. No ingredient can be used more than once in a combination and there is a max of 5 ingredients per combination.
Thanks for your help.
Click here to see answer by Levski123(6) |
Question 746416: A box contains 10 discs: 5 yellow, 3 blue, 2 green. Two discs are selected without replacement. What is the probability that the first disc was blue given that the second disc was blue?
I keep getting the wrong answer and I don't understand why. Thank you!
Click here to see answer by Cromlix(269)  |
Question 746789: A bag has 3 red and 5 purple marbles. One is drawn out at random and not replaced. Then a second marble is drawn out at random. What is the probability that the first marble is purple and the second is red?
Click here to see answer by Cromlix(269) |
Question 746487: "Determine how many different computer passwords are possible if the given number of digits (0-9) and the letters (A-Z) can be repeated and cannot be repeated."
5 digits followed by 2 letters
Repeated:
Not repeated:
I tried an example for repeated - 2-2-2-2-2-B-B but am not sure if that is correct or how to finish the problem.
Thank You.
Click here to see answer by Alan3354(30939)  |
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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
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