Question

What is the number of ways in which
using a collection of 5 As, 4 Bs, 3 Cs,
2 Ds and 1 E, can a 5 letter
combination made?
70
71​

Answer 1

Answer:

71

Step-by-step explanation:

E = (x,⁰+x¹+x²+x³+x⁴+x⁵)(x,⁰+x¹+x²+x³+x⁴)(x,⁰+x¹+x²+x³)(x,⁰+x¹+x²)(1+x)

Coefficient of term x⁵ of the expression E will be 71 which will be the required number of combinations.