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uppose the lifetime (in months) of certain type of battery is a random variable with pdf In a random sample of 4 such batteries, what is the probability that at least 2 of them will work for more than 6 months (round off to second decimal place)

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temmydbrain

Answer:

Step-by-step explanation:

P(a battery work for more than 6 months)[tex]=6f(x) dx=6 8/x3 dx =-4/x2 |\infty6 =4/36=1/9[/tex]

hence from binomial distribution at least 2 of 4 work more than 6 months)=[tex]0.0636 ~ 0.06[/tex]

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