Question 852768: I'm not sure how to solve this question:
The probability that a battery will last 10 hr or more is 0.8, and the probability that it will last 15 hr or more is 0.16. Given that a battery has lasted 10 hr, find the probability that it will last 15 hr or more. (Round your answer to three decimal places.)
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! I'm not sure how to solve this question:
The probability that a battery will last 10 hr or more is 0.8, and the probability that it will last 15 hr or more is 0.16. Given that a battery has lasted 10 hr, find the probability that it will last 15 hr or more.
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P(last 15|last 10) = P(last 15 AND last 10)/P(last 10)
= 0.16/0.8
= 1/5
= 0.2
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Cheers,
Stan H.
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