SOLUTION: An urn contains six white and three black balls. Three balls are drawn. What is the probability that all the drawn balls will be black: a) if the selection is done with replacem

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: An urn contains six white and three black balls. Three balls are drawn. What is the probability that all the drawn balls will be black: a) if the selection is done with replacem      Log On


   



Question 1011984: An urn contains six white and three black balls. Three balls are drawn. What is the probability that all the drawn balls will be black:
a) if the selection is done with replacement.
b) if the selection is done with out replacement.

Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
.
a) if the selection is done with replacement.
.
%283%2F9%29%2A%283%2F9%29%2A%283%2F9%29=1%2F27
.
b) if the selection is done with out replacement.
.
%283%2F9%29%282%2F8%29%281%2F7%29=6%2F504=1%2F84
.