Question

Two out of six computers in a lab have problems with hard drives. If three computers are selected at random for inspection, what is the probability that none of them has hard drive problems?

Answer 1

heya...


total no. of computers=6
no.of computers having problem=2
no.of computers functioning properly=6-2=4


Probability of getting a working computer=4/6=2/3


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Answer 2

sorry I cannot write division , but the ans given was correct.