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A committee of 4 is to be chosen from a group of students. If the number of students in the group increases by 1, the number of different committees triples. How many students are in the group?

 Jan 3, 2022
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5 students initially.

 

5 C 4 ==5 committees of 4 students

5 + 1 ==6 students now.

6 C 4 ==15 committees of 4 students.

 Jan 3, 2022

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