SOLUTION: A bag contains 3 red, 4 white and 5 green balls. Three balls are selected without replacement. Find the probability that the three balls are chosen are: (a) all red, (b) all gree

Algebra ->  Probability-and-statistics -> SOLUTION: A bag contains 3 red, 4 white and 5 green balls. Three balls are selected without replacement. Find the probability that the three balls are chosen are: (a) all red, (b) all gree      Log On


   

Question 868921: A bag contains 3 red, 4 white and 5 green balls. Three balls are selected without replacement. Find the probability that the three balls are chosen are:
(a) all red,
(b) all green,
(c) one of each colour.
If the selection of the three balls was carried out 110 times, how often would you expect to choose:
(d) three red balls?
(e) one of each colour?
PLEASE REPLY ASAP!
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

12 Balls: 3R, 4W, 5G

 (a) all red, %283%2F12%29%282%2F11%29%281%2F10%29 0r 3C3%2F%2812C3%29 =  1/220

 (b) all green, %285%2F12%29%284%2F11%29%283%2F10%29 0r 5C3%2F%2812C3%29=+10%2F220 = 1/22

 (c) one of each colour.%28%283C1%29%284C1%29%285C1%29%29%2F%2812C3%29 = 60/220 = 6/22

 If the selection of the three balls was carried out 110 times, how often would you expect to choose:

 (d) three red balls? 110%281%2F220%29 = .5 times, would not expect to choose 3Rs

 (e) one of each colour? 110%286%2F22%29= 30 times