Suppose lifetime of a particular type of old mobile, X, can be modelled by the probability density function f (x) = 0.5 e-0.5 ×; x > 0. Suppose that you just bought 5 old mobiles, what is the probability that at least 3 of the mobiles will survive less than 2 years?

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A: The provided information are:

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A: Solution

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A: Option B) 0.0042 Explanation:

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Q: question is pictured

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A: Given:

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A: