Question

number of ways in which the letters of the word RAINBOW be arranged such that n and B are together is

Plż answer fast...test today

Answer 1

answer is 5!*6c1*2!

5! for arranging RAIOW

6C1 for choosing 1 gap out of 6 when we place
RAIOW

R A I O W

WE got 6 place to set B and N we chose one out of those 6 by 6c1

now 2! is bcos we can place BN by two ways
1)BN
2) NB

thus answer 5!*6c1*2! = 120*6*2 = 1440

Answer 2

240 is the and n,b arranged in 2 ways ×other words in 5!ways do120 ×2 =240