Question

how would i do 10P4 by hand?

Answer 1

\(\large\color{midnightblue}{ \rm nPr~=~n!~/~(n-r)! }\)

Answer 2

thanks man. what about nCr?

Answer 3

\(\large\color{midnightblue}{ \rm 10~P~4~=~10!~/~(10-4)!= }\)

\(\large\color{midnightblue}{ \rm 10!~/~6! }\)

\(\large\color{midnightblue}{ \rm (6! \times 7 \times 8 \times 9 \times 10)~/~6! }\)

Answer 4

The rest you can do yourself.

What about nCr,

\(\large\color{midnightblue}{ \rm nCr=n!~~/~~r!(n-r)! }\)

Answer 5

awesome. thanks so much.

Answer 6

Anytime :)

Answer 7

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