answer all questions with explanation

Suppose, among a group of 10 friends (including yourself), you randomly take turns buying drinks once every month for twelve months. To determine who buys drinks each month, each person is assigned a number from 1 to 10 and a fair ten-sided dice is rolled. 0 Dene a reasonable random variable that will help you answer the following two questions, and specify what distribution it follows. 0 What is the probability you end up buying drinks more than twice out of the twelve months? a What is the expected number of times that you will be buying drinks