The switchboard in a Minneapolis law office gets an average of 2 incoming phone calls during the noon hour on Mondays. Experience shows that the existing staff can handle up to six calls in an hour. Let X = the number of calls received at noon. What is the probability that the office receives a. exactly 4 calls at noon on Monday.  b. exactly 10 calls at noon on Monday

A box contains 500 envelopes, of which 75 contain $100 in cash, 150 contain $25, and 275 contain $10. An envelope may be purchased for $25. find the probability that the first envelope purchased contains less than $100.   Round your answer to 2 decimal places.

Determine the probability that 31​, 32​, 33​, 34​, or 35 flights will arrive on time

A basketball player makes 160 out of 180 free throws. We would estimate the probability that the player makes the next free throw to be?

You roll a die five times. What is the probability that you will see a string of three or more consecutive ones?

When women turn 40, their gynecologists typically remind them that it is time to undergo mammography screening for breast cancer. The data in the given table are based on 100,000 U.S. women, ages 40 to 49, who participated in mammography screening. Solve, a. Use the table to find the probability that a woman aged 40 to 49 has breast cancer. b. Among women without breast cancer, find the probability of a positive mammogram. c. Among women with positive mammograms, find the probability of not having breast cancer.

In a large school, it was found that 71% of students are taking a math class, 72% of student are taking an English class, and 93% of students are taking both. Find the probability that a randomly selected student is taking a math class or an English class. Write your answer as a decimal, and round to 2 decimal places if necessary. Find the probability that a randomly selected student is taking neither a math class nor an English class. Write your answer as a decimal, and round to 2 decimal places if necessary.

Eric teaches ceramics in his studio. He estimates that one 20% people who call for information about a class will sign up for the class. Last week he received nine calls. Find the probability that two of the people will sign up for class?

Give the probability in decimal form. The campus vets club is having a raffle and is selling 1500 tickets. If the people on your dorm floor bought 225 of these tickets, what is the probability that someone on your floor will hold the winning ticket?

A baseball player has a batting average of 0.31. What is the probability that he has exactly 4 hits in his next 7 at bats? In the box below, type in what you entered into the calculator to get your answers for each question. If you used the online Statistics Calcuator, indicate the screens used, and any values of input variables.