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
[tex]P(n,r)=\frac{(n)!}{(n-r)!} \\[/tex]
[tex]P(7,1)=\frac{(7)!}{(7-1)!} = 7\\\\\ P(3,1)=\frac{(3)!}{(3-1)!} = 3\\\\ P(6,1)=\frac{(6)!}{(6-1)!} = 6\\\\[/tex]
all these process are related to each other so we should multiply them
7*3*6=126
