The student council at west high has 20 members .They want to select a committee of to work with the school administration on policy matters affecting students directly .How many committees of 3 students are possible ?

Explanation

To solve the problem of selecting a committee of 3 students from a council of 20 members, we can use the concept of combinations. The number of ways to choose \( r \) members from a total of \( n \) members is given by the combination formula:

\[ \binom{n}{r} = \frac{n!}{r!(n-r)!} \]

### Step-by-Step Solution:

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