The length of time, Y, that a customer spends in line at a bank teller’s window before being served is described by the exponential pdf fY (y) =0.2e−0.2y, y ≥0. (a) What is the probability that a customer will wait more than ten minutes? (b) Suppose the customer will leave if the wait is more than ten minutes. Assume that the customer goes to the bank twice next month. Let the random variable X be the number of times the customer leaves without being served. Calculate pX (1).

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

pla·gia·rism

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

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