The operator of a pumping station has observed that demand for water during early afternoon hours has an approximately exponential distribution with mean 100 cfs (cubic feet per second). (a) find the probability that the demand will exceed 190 cfs during the early afternoon on a randomly selected day. (round your answer to four decimal places.)

The probability that the demand will exceed 190 cfs during the early afternoon on a randomly selected day is

Step-by-step explanation:

Let Y be the water demand in the early afternoon.

If the random variable Y has density function f (y) and a < b, then the probability that Y falls in the interval [a, b] is

A random variable Y is said to have an exponential distribution with parameter if and only if the density function of Y is

If Y is an exponential random variable with parameter β, then

mean = β

To find the probability that the demand will exceed 190 cfs during the early afternoon on a randomly selected day, you must:

We are given the mean = β = 100 cubic feet per second

Compute the indefinite integral

Compute the boundaries

The probability that the demand will exceed 190 cfs during the early afternoon on a randomly selected day is

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94