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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a
513
b
813
c
1019
d
919
answer is D.
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Detailed Solution
Probability of both are good= both are goodone is good ×one is rotten+both are good 10C2 10C1.5C1+10C2=4595=919
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