SOLUTION: How many committees of four can be selected from a group of seven if the same person must be included in each committee?
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-> SOLUTION: How many committees of four can be selected from a group of seven if the same person must be included in each committee?
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You can put this solution on YOUR website! How many committees of four can be selected from a group of seven if the same person must be included in each committee?
Suppose the person who must be in each committee is named Bob.
The problem amounts to selecting 3 from the 6 people besides Bob
to put in a committee with Bob. So the answer is "6 things choose 3".
6C3 = (6*5*4)/(3*2*1) = 120/6 = 30
Edwin
