Question

For any two natural nos. n and r such that n >r, npr - ner
a) <=
b) >=
c)=​

Answer 1

Step-by-step explanation:

The number of combinations of n dissimilar things taken r at a time will be

n

C

r

. Now if we take out a group of r things, we are left with a group of (n-r) things. Hence the number of combinations of n things taken r at a time is equal to the number of combinations of n things taken (n-r) at a time.