A bag contains 7 red balls 4 white balls, 5 black balls. two balls are drawn at random and found to be white. what is the probability that all are white balls
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5
total ball -16
white ball-4
so probability- no. of outcome ÷ total no. of outcomes
so- 2÷ 16
white ball-4
so probability- no. of outcome ÷ total no. of outcomes
so- 2÷ 16
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3
2/16 is the probability of white balls
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