Binomial Coefficients and Combinatorics

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Question 1 of 13

What is the formula for calculating the binomial coefficient of n and k, denoted as (\binom{n}{k})?

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$$\binom{n}{k} = \frac{n!}{k!}$

$$\binom{n}{k} = \frac{n!}{(n-k)!}$

$$\binom{n}{k} = \frac{(n+k)!}{n!}$

$$\binom{n}{k} = \frac{(n+k)!}{k!}$

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