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From a lot of 12 flares, 4 are selected at random. If the lot contains 4 defective flares *flares that will not fire), what is...Asked by josh
a) from a to of 12 flatres, 4 are selected at random. if the lot contains 4 defective flares (flares that wilt fire), what is the probability that all 4 will not work?
B) what is the probability that at most 2 will not work?
B) what is the probability that at most 2 will not work?
Answers
Answered by
josh
a) total ways of drawing any 4
= 12c4 = 495
b)
= 462/495
= 12c4 = 495
b)
= 462/495