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5 December, 23:54

How many ways are there to select 7 countries in the United Nations to serve on a council if 3 is selected from a block of 54, 2 are selected from a block of 69 and 2 are selected from the remaining 66 countries?

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  1. 6 December, 00:43
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    (54C3) + (69C2) + (66C2) = 29295
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