On average, 5 customers arrive at the drive-up window of a fast-food restaurant every 4 minutes during the lunch hour. what is the probability that the next customer will arrive within three minutes? (use an exponential distribution to determine this probability.)

0.9765

Explanation:

The cumulative distribution function for exponential distribution for random variable x is given by :-

, where is the mean of the distribution .

Given : On average, 5 customers arrive at the drive-up window of a fast-food restaurant every 4 minutes during the lunch hour.

Then

Now, the probability that the next customer will arrive within three minutes :-

Hence, the probability that the next customer will arrive within three minutes = 0.9765

i believe the answer is b. we

peace, morning, sun glooming, sorrow, woe pardon’d, punished, more hence, talk, story. all of these three words have to do something with a depressed, regretful tone. woe is another word for misery, heartache, so all of these words are about unhappy feelings.