In how many ways can 3 people be seated i a rwo containing 7 seats?

In how many ways can 4 people be seated in a row containing 6 seats?

In how many ways can 6 persons be seated at a round table?

In how many ways can five people be seated in a car with two people in the front seat and three in the rear, if two particular persons out of the five cannot drive?

In how many ways can n women be seated in a row so that a particular women will not be next to each other?

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