Question

only answer the one first question.​

Answer 1

Answer:

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We know that if

n

C

p

=

n

C

q

then one of the following condition need to be satisfied.

i)p=q

ii)n=p+q

From the problem,

n

C

12

=

n

C

5

∴12



=5

So, the condition (ii) must be satisfied n=12+15=17

The value of n is 17