SOLUTION: 7. A box contains five colored balls and four white balls. If three balls are drawn one-by-one, find the probability that they are all white if the draws are made as follows: a. W

Algebra ->  Probability-and-statistics -> SOLUTION: 7. A box contains five colored balls and four white balls. If three balls are drawn one-by-one, find the probability that they are all white if the draws are made as follows: a. W      Log On


   



Question 275128: 7. A box contains five colored balls and four white balls. If three balls are drawn one-by-one, find the probability that they are all white if the draws are made as follows:
a. With replacement
b. Without replacement

Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
a.
There are 9 balls.
(4/9)^3=64/729
.
b.
4/9 * 3/8 * 2/7 = 1/21
.
Ed