SOLUTION: Sixteen batteries are tested to see if they last as long as manufacturers claims. Four batteries fail the test. Two batteries are selected at random without replacement. Find the

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Question 922086: Sixteen batteries are tested to see if they last as long as manufacturers claims. Four batteries fail the test. Two batteries are selected at random without replacement. Find the probability that both batteries fail the test. Find the probability that batteries pass the test. Find the probability that at least one fail the test.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
16 batteries: 4def, 12Good
Two batteries are selected at random without replacement
P(both def) = %284%2F16%29%283%2F15%29
P(both Good)= %2812%2F16%29%2811%2F15%29
P(at least one failed) = 1 - P(both Good) = 1 - %2812%2F16%29%2811%2F15%29