Question

In the below word how many words are there in which R and W are at the end positions?
RAINBOW

A) 120 B) 180 C) 210 D) 240

Answer 1

Step-by-step explanation:

When R and W are the first and last letters of all the words then we can arrange them in 5!ways. Similarly When W and R are the first and last letters of the words then the remaining letters can be arrange in 5! ways.

Thus the total number of permutations = 2 x 5! = 2 x 120 = 240