# Question: Hybrid car batteries have an estimated average life of eight

Hybrid car batteries have an estimated average life of eight years. Using this average, if battery life has an exponential distribution, how likely is it that a random hybrid battery will have a life of

a. At least 6 years?

b. Between 7 and 9 years?

c. Less than 5 years?

a. At least 6 years?

b. Between 7 and 9 years?

c. Less than 5 years?

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