Customer service the duration t in minutes of customer, Basic Statistics

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Customer service the duration t in minutes of customer

Question: Customer service the duration t (in minutes) of customer service calls received by a certain company is given by the probability density function

f(t) = 0.4e^-0.4t t ≥ 0

Find the probability that a call selected at random lasts

(a) 4 minutes or more.

(b) 10 minutes or more.

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Basic Statistics: Customer service the duration t in minutes of customer

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Basic Statistics: Customer service the duration t in minutes of customer

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