Question

Mong Corporation makes auto batteries. The company claims that 80% of its LL70 batteries are good for 70 months or longer.
a. What is the probability that in a sample of 100 such batteries, exactly 85 will be good for 70 months or longer?
b. Find the probability that in a sample of 100 such batteries, at most 74 will be good for 70 months or longer.
c. What is the probability that in a sample of 100 such batteries, 75 to 87 will be good for 70 months or longer?
d. Find the probability that in a sample of 100 such batteries, 72 to 77 will be good for 70 months or longer.


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  • CreatedAugust 25, 2015
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