SOLUTION: In how many ways can a group of 10 people be divided into: a. two groups consisting of 7 and 3 people? b. three groups consisting of 4, 3, and 2 people?

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Question 717583: In how many ways can a group of 10 people be divided into:
a. two groups consisting of 7 and 3 people?
b. three groups consisting of 4, 3, and 2 people?
Answer by lynnlo(4176) About Me  (Show Source):
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ANSWER:
(A)(10/7).(3/3)=120
(B)(10/4).(4/3).(3/2)