Question: If $2 \times {_{}^{n}C}_{5} = 9 \times {_{}^{n - 2}C}_{5}$, then the value of n will be....

Question

If $2 \times {_{}^{n}C}_{5} = 9 \times {_{}^{n - 2}C}_{5}$ , then the value of n will be.

Answer 1

By inspection $n = 10$ .

Question: If \(2 \times {_{}^{n}C}_{5} = 9 \times {_{}^{n - 2}C}_{5}\), then the value of n will be....