Question #255534

10!/2!(10-2)!



1
Expert's answer
2021-10-25T19:51:27-0400
(102)=10!2!(102)!=10(9)1(2)=45\dbinom{10}{2}=\dfrac{10!}{2!(10-2)!}=\dfrac{10(9)}{1(2)}=45


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