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?

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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) About Me  (Show Source):
Answer by arjay(1) About Me  (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?