A person wants to leave station Q. there are 4 routes from station Q to P and 5 routes from Q to R. In how many ways can he travel the station Q.

Options

A. 9
B. 1
C. 20
D. 12

Answer

A

Explanation

He can go from` " " ` Q to P in 4 ways
and ` " " `
Q to R in 5 ways
he can leave station Q in `4+5=9` ways
Ans.[1]