There are m seats in the first row of a theatre, of which n are to be occupied.The number of ways of arranging n persons if no two persons sit side by side is

There are 10 seats in the first row of a theater of which 4 are to be occupied.The number of ways of arranging 4 person so that no two persons sit side by side is:

There are 10 seats in the first row of a theatre of which 4 are to be occupied. The number of ways of arranging 4 persons so that no two persons sit side by side is:

There are 10 seats in the first row of a theatre of which 4 are to be occupied. The number of ways of arranging 4 persons so that no two persons sit side by side is:

The total number of sitting arrangements of 7 persons in a row if two persons occupy the end seats is

Ten persons are arranged in a row.The number of ways of selecting four persons so that no two persons sitting next to each other are selected is

Ten persons are arranged in a row . The number of ways of selecting four persons so that no two persons sitting next to each other's are selected is

The total number of sitting arrangements of 7 persons in a row if one person occupies the middle seat is

Fifteen persons sit around a table. Find the number of arrangments that have two specified persons not sitting side by side.