Math, asked by boomu145, 18 hours ago

if nc6 = nc5 find n and nc2

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Answers

Answered by ishanbhai
0

Answer:

It is given that,

n

C

5

=

n

C

6

5!(n−5)!

n!

=

6!(n−6)!

n!

⟹6×5!(n−6)!=5!(n−5)(n−6)!

⟹6=n−5

⟹n=11

Hence,

13

C

n

=

13

C

11

11!×2!

13!

=

2

13×12

=78

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