A researcher plants 12 seeds whose germination times in
Chapter 4, Problem 4.2.4(choose chapter or problem)
A researcher plants 12 seeds whose germination times in days are independent exponential distributions with =0.31. (a) What is the probability that a given seed germinates within ve days? (b) What are the expectation and variance of the number of seeds germinating within ve days? (c) What is the probability that no more than nine seeds have germinated within ve days?
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