Question
you need 4 eggs , there are 12 eggs in the refrigerator but do not realise that 2 of these are rotten . what is the probability that none is rotten of the 4 eggs you choose at random ?
Answers
Reiny
prob(rotten) = 2/2 = 1/6
prob(not rotten) = 5/6
You want prob that none of 4 are rotten
= C(4,0)(1/6)^0 (5/6)^4
= 1(1)(625/1296)
= 625/1296
prob(not rotten) = 5/6
You want prob that none of 4 are rotten
= C(4,0)(1/6)^0 (5/6)^4
= 1(1)(625/1296)
= 625/1296