Question
If the ratio $C(2 n, 3): C(n, 3)$ is equal to $11: 1$, find $n$.(a) 6(b) 9(c) 12(d) 18
Step 1
We have the ratio \( C(2n, 3) : C(n, 3) = 11 : 1 \). Step 2: Express the combinations using the formula for combinations. The formula for combinations is given by \( C(k, r) = \frac{k!}{r!(k-r)!} \). Therefore, we can write: \[ C(2n, 3) = Show more…
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