I have an exercise, i try to finish all of the question. I stack for the last one. Anyone can help me? I attach the question.
I find the solution for (i) 2 (ii) 2.63 (iii) 0.055
And i need your help to solve the last one (iv). I guess we use probability formula to solve this question but i know which one of the number of favorable outcomes.
Thank you
A favorable outcome here is when we picked one person who borrowed $6$ books and one person who borrowed some other number of books. By the multiplication principle, the number of favorable outcomes is equal to the product of: [the number of ways to pick one person from the people who borrowed $6$ books] times [the number of ways to pick one person from the people who borrowed other than $6$ books].