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A particular committee needs one 7-grader and three 8-graders. If there are four 7-graders and six 8-graders applying to the committee, in how many ways can the committee be filled?

liala Aug 16, 2017

#1**+2 **

This is a combinations problem

There are 4 seventh graders and we want to choose one of them......

The number of ways this can be done = C (4,1) = 4 (1)

There are six eighth graders and we want to choose any three of them

The number of ways this can be done = C(8,3) = 56 (2)

So....the total possible committees = (1) * (2) = (4) * (56) = 224

CPhill Aug 16, 2017