Math, asked by thakurume1008, 2 months ago

25. If nC3=nC5 then find the value of n.

Answers

Answered by UniqueBabe

2

Answer:

n C

r

=

(r!)(n−r)!

n!

n

n

C

3

C

5

=

>

(3!)(n−3)!

n!

=

5!(n−5)!

n!

=

>

3!×

(n−

3)×

(n−

4)×

(n−

5)!=

5×

4×

3!×

(n−

5)!

=

>

(n−

3)×

(n−

4)=

5×

4

n−

3=

5

=

>

n=

8

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