Question 616200
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Hi, 
In how many ways can 3 boys and 2 girls sit in a row? 5 people...5! = 120 ways
In how many ways can they sit in a row if the boys and girls are each to sit together? 2 ways
In how many ways can they sit in a row if just the girls are to sit together?
Thinking of the girls as being 1 unit...now 4 entitities ...4! = 24 ways