SOLUTION: A box contains 7 red balls, 5 white balls and 3 green balls. How many three balls can we select such that there are two exactly green?

Question 629516: A box contains 7 red balls, 5 white balls and 3 green balls. How many three balls can we select such that there are two exactly green?
Found 2 solutions by reviewermath, arjay:
Answer by reviewermath(1029) (Show Source): You can put this solution on YOUR website!

Answer by arjay(1) (Show Source): You can put this solution on YOUR website!
how many 4 digits numbers can we make using the digits 3,6,7 and 8 without repetions?
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