A bag contains 10 counters. 6 of them are white. a counter is taken at random and not replaced. A second counter is taken out of the bag at random. Calculate the probability that both two counters are white.
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A bag contains 10 counters. 6 of them are white. a counter is taken at random and not replaced. A second counter is taken out of the bag at random. Calculate the probability that both two counters are white.
Probability first counter is white 6 / 10
Probability second counter is white 5 / 9
Probability both conditions occurring (6 / 10) • (5 / 9) = 30 / 90
reduces to 1 / 3 or 33 1/3 %
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