JEE Advanced2015MathematicsPermutation and CombinationActual
Let n be the number of ways in which 5 boys and 5 girls can stand in a queue in such a way that all the girls stand consecutively in the queue. Let m be the number of ways in which 5 boys and 5 girls can stand in queue in such a way that exactly four girls stand consecutively in the queue. Then the value of m n is
Correct answer
0
Step-by-step solution
n = 6 _ . 5 _ m = 5 C 4 × 6 P 2 × 4 ! × 5 ! m n = 5