Question

. If ⁿC₃ = ⁿC₅ , then find the value of n .​

Answer 1

Answer:

nCr=(r!)(n−r)!n!

Given, nC3=nC5

=>(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

From this, n−3=5

=>n=8

 

Answer 2

Answer:

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