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A box contains 15 mangoes out of which 5 are rotten. Two mangoes are taken out together. If one of them is found to be good, then the probability that both are good is
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Correct option is D
Probability of both are good= both are goodone is good ×one is rotten+both are good 10C2 10C1.5C1+10C2=4595=919Similar Questions
In a bolt factory, machines A, B and C manufacture 60%, 25%and 15% respectively. Of the total of their output 1%, 2%, 1% is defective bolts. A bolt is drawn at random from the total production and found to be defective. From which machine, the defective bolt is most expected to have been manufactured
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