The number of ways in which 3 men and 3 women can be arranged in a row of 6 seats, such that the first and last seats must be filled by men is

Step-by-step solution

3 M , 3 ~W array |l|l|l|l|l|l| M & & & & & M array Number of ways of filling first and last seats = ^3 C₂ 2!=6 No. of ways of filling middle seats is =4 ! Requires number =24 6=144