5 - 6 Evaluating Permutations and Combinations Evaluate the expression.

C ( 11 , 4 )

To find:

The value of C(11,4)

Approach:

The number of combinations of n objects taken r at a time is,

C(n,r)=n!r!(n−r)! …(1)

Here, n is the total number of objects and r is the number of the objects taken at a time.

Calculation:

Substitute 11 for n and 4 for r in equation (1),