A box contains 12 mangoes out of which 4 are spoilt. If four mangoes are chosen at random, find the probability that Exactly three are not spoiled. Choose the most appropriate option:
A) 116/495
B) 224/495
C) 129/495
D) 187/495
E) 197/495
equired probability = 8C3 . 4C1/12C4 = 56 x 4/495   = 224/495.   ANSWER:224/495
<result>B</result>
A box contains 12 mangoes out of which 4 are spoilt. If four mangoes are chosen at random, find the probability that Exactly three are not spoiled.