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Let ? be the number of female customers who arrive at a barber shop before the...

Let ? be the number of female customers who arrive at a barber shop before the first male customer arrives. The probability of a female customer arriving at the barber shop is 0.75.

(i) Find ?(? ≥ 8).

(ii) In a random sample of size 36, find the normal approximation for ?(2.5 ≤ ?̅ ≤ 3.5), where ?̅ is the sample mean.

Math   Statistics-And-Probability   
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