Question

find the number of ways to arrange 5 people P1, P2.... P5 in a row such that first two positions in a row is occupied by p1 and p2​

Answer 1

Given:

5 people : P1, P2, P3, P4 and P5

First 2 positions are occupied by P1 and P2.

To Find

Find the number of ways to arrange the 5 people

Find the number of combinations possible for the first 2 seats:

First two seats = 2!

First two seats = 2 x 1

First two seats = 2

Find the number of combinations possible for the last 3 seats:

Last 3 seats = 3!

Last 3 seats = 3 x 2 x 1

Last 3 seats = 6

Find the total number of combinations:

Total combinations = 2 x 6

Total combinations = 12

Answer: There are 12 ways to arrange them.

Answer 2

Answer:

there are twelve Ways to arrange them