Question-42106

Question Number 42106 by rahul 19 last updated on 18/Aug/18

Answered by tanmay.chaudhury50@gmail.com last updated on 18/Aug/18

5 c_{2} \times 2! + 5 c_{3} \times 3! + 5 c_{4} \times 4! + 5 c_{5} \times 5!

= 5 p_{2} + 5 p_{3} + 5 p_{4} + 5 p_{5}

= 20 + 60 + 120 + 120 = 320

Commented by rahul 19 last updated on 18/Aug/18

thanks sir ��