SOLUTION: a package contains 12 batteries, 3 of which are defective. if 4 are selected randomly, find the probability of getting: a) 0 defective batteries b) 1 defective battery c)

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Question 435578: a package contains 12 batteries, 3 of which are defective. if 4 are selected randomly, find the probability of getting:
a) 0 defective batteries b) 1 defective battery c) 3 defective batteries

Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The experiment follows a hypergeometric distribution.
a) %289C4%2A3C0%29%2F%2812C4%29+=+14%2F55
b) %289C3%2A3C1%29%2F%2812C4%29+=+28%2F55
c) %289C1%2A3C3%29%2F%2812C4%29+=+1%2F55