In how many ways 10 Indians, 5 Asmericans and 4 Englishmen can be seasted in a row so that neither Americans nor Englishmen sit between Indians.

In how many ways can 8 Indians, 4 Americans and 4 Englilshmen be seated in a erow so that all persons of the same nationaslity sit together.

In how many ways 4 boys and 4 girls can be seated in a row so that boys and girls are alternate?

In how many ways can 5 boys and 3 girls be seated in a row so that each girl is between 2 boys?

In how many ways 4 boys and 3 girls can be seated in a row so that they are alternate?

In a dinner party there are 10 Indians, 5 Americans and 5 Englishmen. In how many ways can they be seated in a row so tht all persons of the same nastionality sit together?

In how many ways can 5 girls and 3 boys be seated in a row so that no two boys are together?

In how many different ways 5 girls can be seated in a row?

In how many ways can 4 girls and 3 boys be seated in a row so that no two boys are together?