# How do you find the permutation or combination of 7C4?

The process of selecting "r" items out of "n" items is called permutations and combinations.

## Answer: The permutation or combination of 7C4 is 35.

The permutation or combination can be found by an expansion of the formulas of permutation or combination

## Explanation:

The formula to find the combination of nCr is n! / {r! × (n - r)!}.

Therefore, using above formula we can find combination value of 7C4 as follows.

7C4 = 7! / { 4! × (7 - 4)! }

= 7! / { 4! × 3! }

= (7 × 6 × 5 × 4 × 3 × 2 × 1) / {(4 × 3 × 2 × 1) × (3 × 2 × 1)}

= 35