Question

What is the formula of ncn

Answer 1

Here is your answer-

Step-by-step explanation:

The formula for combinations is nCr = n! / r! * (n - r)!, where n represents the number of items, and r represents the number of items being chosen at a time.

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Answer 2

The formula for $^nC_n=1$

Step-by-step explanation:

Since we have given that

$^nC_n$

As we know that ,

$^nC_r=\dfrac{n!}{r!(n-r)!}\\\\^nC_n=\dfrac{n!}{n!(n-n)!}\\\\^nC_n=\dfrac{1!}{0!}\\\\^nC_n=1$

Hence, the formula for $^nC_n=1$

# learn more:

(a+b)^4-(a-b) ^4

use ncn formula

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