There are five friends. The first friend heard a rumor and he/she called the second friend and that friend called the third friend, and so on. Assume that each friend calls once and the average time to call is one hour. What is the most probable time when the last friend hears the rumor?

A player pays a certain amount of money to randomly roll a 6-sided and a 4-sided die, both balanced. If the sum of the dice is less than 5 or greater than 9, the player receives a prize of $ 90. Otherwise he loses the money paid to play, in dollars and cents, to keep this game fair. Write only the number corresponding to the prize without a dollar sign and rounded to 2 decimal places.

A magazine subscription service is having a contest in which the prize is 180000. If the company receives 3 million entries, which is the expection of the contest?