Question -
Answer -
We know that if nCp = nCq,then one of the following conditions need to be satisfied:
(i) p = q
(ii) n = p + q
So from thequestion 18Cx = 18Cx + 2,we can say that
x ≠ x + 2
So, the condition (ii)must be satisfied,
18 = x + x + 2
18 = 2x + 2
2x = 18 – 2
2x = 16
x = 16/2
= 8
∴ The value of xis 8.