Question

Choose the correct formula for combination.
A . n!/r!(n-r)!
B. n!/(n-r)!

Answer 1

B

Explanation:

The number of combinations of n objects taken r at a time is determined by the following formula: C(n,r)=n!/(n−r)!

Answer 2

Answer: The answer is A n!/r!(n-r)!

search it up