In how many different ways a grandfather along with two of his grandsons and four granddaughters can be seated in a line for a photograph so that he is always in the middle and the two grandsons are never adjacent to each other

If a Grand father along with his two grandsons and four grand daughters are to be seated in a line for a photograph so that he is always in the middle then the probability that his two grandsons are never adjacent to each other is

If a Grand father along with his two grandsons and four grand daughters are to be seated in a line for a photograph so that he is always in the middle then the probability that his two grandsons are never adjacent to each other is

In how many ways 6 girls can be seated in two chairs ?

he number of ways in which 5 boys and 5 girls can be seated for a photograph so that no two girls sit next to each other is :

In how many ways 12 boys can be seated on 10 chairs in a row so that two particular boys always take seat?

A family of 4 brothers and 3 sisters is to be arranged in a row for a photograph. In how many ways can they be seated if Q No two brothers are together.

In how many ways 5 boys and 4 girls can be seated in a row so that no two girls are together.