Question

4) Johnny Awesome has 16 books. He wants to take 4 on vacation. How many different combinations of books canJohnny make?

Answer 1

Step-by-step explanation

Since Johnny has 16 books and wants to select 4 for his vacation, we will have;

`16C4=(16!)/((16-4)!4!)=(16!)/(12!4!)=(16*15*14*13*12!)/(12!*4*3*2*1)=2*5*14*13=1820`

Answer: 1820 combinations