Find `""^(18)C_(3)+^(18)C_(2)`

Explanation

To solve the problem \( ^{18}C_{3} + ^{18}C_{2} \), we can use the identity for combinations:

### Step 1: Use the Combination Identity
We know from the combination identity that:
\[ ^{n}C_{r} + ^{n}C_{r-1} = ^{n+1}C_{r} \]
In our case, \( n = 18 \) and \( r = 3 \). Thus, we can rewrite the expression as:
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