The amount of time high school students spend each weeknight doing homework is normally distributed with a mean of 52.5 minutes and a standard deviation of 5.1 minutes. Find indicated probability of time spent each weeknight doing homework. 45. A randomly selected high school student spends at least 40 minutes 46. A randomly selected high school student spends at most 60 minutes 47. A randomly selected high school student spends between 45 minutes and 65 minutes

A license plate is a sequence of 2 letters followed by 2 different digits.     A letter is A through Z, and a digit is 0 – 9.  Note, a letter may repeat but digits may not repeat.    How many different license plates are possible?

In a certain state, license plates each consist of 3 letters from the English alphabet, followed by 3 digits. How many different license plates are there that have no repeated letters or digits?

There are nine different positions on a baseball team. If a team has 15 players how many different line-ups can the team make? (Assume every player can play every position.) The team can make different line-ups. Baseball games consist of nine innings. A team wants to change its line-up every inning. If no game goes to extra innings, and a season consists of 135 games, how many complete seasons can the team play without repeating a line-up? The team can play complete seasons without repeating a line-up. (Your answer should be an integer.)