Question: i need help how to solve it 6. a On average there are about 25 imperfections in 100 meters of optical cable. Use the Poisson

i need help how to solve it

6. a On average there are about 25 imperfections in 100 meters of optical cable. Use the Poisson distribution to estimate the probability that there are no imperfections in 1 meter cable. What is the probability that there is no more than one imperfection in 1 meter cable?

7. Of all customers purchasing automatic garage door openers, 75% purchase chain-driven model. Let X = the number among the next 15 purchasers who select the chain-driven model.

a. What is the frequency function (pmf) of X?

b. Compute P(X > 10).

c. Compute P( 6 X 10).

d. Compute and 2 .

e. If the store currently has in stock 10 chain-driven models and 8 shaft-driven models, what is the probability that at least 7 out of the 15 customers select a chain-driven model from this stock?

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