Posted by purple on .
Two marbles are drawn from a bag containing 6 white, 4 red, and 6 green marbles. Find the probability of both marbles being white.

math 
Jen,
The probability of one of the marbles being white is 6/16=3/8 so the probability of both of the marbles being white is (3/8) x (3/8)

math 
Reiny,
Jen's answer assumes that the first marble drawn is then returned to the bag.
If we simply draw two marbles, one after the other, the prob of the stated event is
6/16*5/15
= 1/8