A committee of six is chosen from 14 people. In how many ways can this be done?
Question
A committee of six is chosen from 14 people. In how many ways can this be done?
Solution
This is a combination problem. The formula for combinations is:
C(n, k) = n! / [k!(n-k)!]
where:
- n is the total number of options,
- k is the number of options chosen at a time,
- "!" denotes factorial, which means multiplying all positive integers up to that number.
In this case, n = 14 (the total number of people) and k = 6 (the number of people to choose for the committee).
So, the number of ways to choose a committee of six from 14 people is:
C(14, 6) = 14! / [6!(14-6)!]
Calculating the factorials:
14! = 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 6! = 6 × 5 × 4 × 3 × 2 × 1 8! = 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1
Substituting these into the formula gives:
C(14, 6) = (14 × 13 × 12 × 11 × 10 × 9) / (6 × 5 × 4 × 3 × 2 × 1)
Calculating this gives:
C(14, 6) = 3003
So, there are 3003 ways to choose a committee of six from 14 people.
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