Question

Books: Josephine has seven chemistry books, three history books, and six statistics books. She wants to choose one book of each type to study. In how many
ways can she choose the three books?
The total number of ways Josephine can choose the three books is

Answer 1

Answer:

Step-by-step explanation:

we have totally 7+3+6=16 books.

let us choose one book from the all these books;

by using permutation formula we will get the answer

$P(n,r)=\frac{(n)!}{(n-r)!}$

$P(7,1)=\frac{(7)!}{(7-1)!} = 7\\\\\ P(3,1)=\frac{(3)!}{(3-1)!} = 3\\\\ P(6,1)=\frac{(6)!}{(6-1)!} = 6$

all these process are related to each other so we should multiply them

7*3*6=126