Choose the correct definition of (n/k) from below a. k! /n! (n-k)! b. n! /(n-k)! c. n! /k! (n-k)! d. n! /k! (k-n)!

C.  

Step-by-step explanation:

We know that a combination is a collection of the items where the order doesn't matter. It is a way to calculate the total outcomes of an event where order of the outcomes does not matter. It is denoted by C(n,k) or (n,k) or (n/k).

The formula for the number of combinations of n things taken r at a time is given by :-

Hence, C is the right option.

Combination helps us to find the number of ways. The correct definition that describes the combination (n/k) is .

A combination helps us to find the number of ways something can be selected from a set. It is given by the formula,

Where n is the total number of choices in the set, r is the number of choices we want.

Given to us

(n/k)

The correct definition that describes (n/k) using the combination formula

Hence, the correct definition that describes the combination (n/k) is .

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if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: