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A drawer contains 3 white balls and 6 black balls. Two balls are drawn out of the box at random. What is the probability that they both are black?

 Jul 3, 2022
 #1
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TOTAL: 9 balls

Probability that first pick is black= 6/9=2/3

Probability that second pick is black (the first one is taken already, so subtract 1 from numerator and denominator.) = 5/8

Multiply both:5/8 x 2/3=5/12

 Jul 3, 2022

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