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Math 110 problem...help?
Ann, Brian, Clark, Dean, Emily, Frank, and Greg are student senators. A committee is being formed that must include atleast one of these senators.
How many different variations for the committee are there?
10 points!
1 Answer
- Anonymous1 decade agoFavorite Answer
You must use combinations to solve this one, like so:
7C1 + 7C2 + 7C3 + 7C4 + 7C5 + 7C6 + 7C7
I won't solve it for you, but I will give you everything you need to know to solve it. The formula for combinations is:
nCr = (n!)/[(n-r)!(r!)]
So, simply apply that formula to all of the combinations above then add to get your answer.
Source(s): My experience