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A day full of math games & activities. Find one near you.
How do you find the permutation or combination of 7C4?
Solution:
The process of selecting "r" items out of "n" items is called permutations and combinations.
The permutation or combination can be found by an expansion of the formulas of permutation or combination
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
Thus, the permutation or combination of 7C4 is 35.
How do you find the permutation or combination of 7C4?
Summary:
The permutation or combination of 7C4 is 35.
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