A treasure chest contains 10 rubies and 8 diamonds. In how many ways can a group of six jewels be chosen if the group must contain exactly 2 diamonds or exactly 2 rubies?
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4) A treasure chest contains 10 rubies and 8 diamonds. In how many ways can a group of six jewels be chosen if
the group must contain exactly 2 diamonds or exactly 2 rubies?
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