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Two black balls and five white balls are placed in a bag. If Amy draws two balls from the bag, what is the probability that they are both white? Please show your work.

User Gunwant
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5 votes

first ball and second ball

5 white out of 7 total x 4 white remaining out of 6 total remaining


(5)/(7) x
(4)/(6)


= (5*4)/(7*6) = (20)/(42) = (10)/(21)

User Tina
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7 votes

2 +5 = 7 total balls.

!st one being white = 5/7

2nd one being white = 4/6 = 2/3

Chance of both being white = 5/7 x 2/3 = 10/21

User Mad Eddie
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