The number of ways, 5 boys and 4 girls can sit in a row so that either all the boys sit together or no two boys sit together, is

Question

Accepted Answer

Correct answer: 17280. (17280) A : number of ways that all boys sit together =5 ! 5 ! B : number of ways if no 2 boys sit together =4 ! 5 ! A ∩B= Required no. of ways =5 ! 5 !+4 ! 5 !=17280

$The number of ways, 5 boys and 4 girls can sit in a row so that either all the boys sit together or no two boys sit together, is$

Solution

More Permutations & Combinations PYQs