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Fundamental Principle of Counting

Quick practice

Question 1 of 5

Consider we have a set of n elements and out of these n elements we have to arrange r elements then the number of ways the r elements can arrange are:


A

\frac{n !}{(n-r) !}

B

\frac{n !}{(r-n) !}

C

\frac{n !}{(n-1) !}

D

\frac{n !}{(n-n) !}

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