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all coffee mixtures sold in a store contain colombian, [#permalink]
28 Mar 2007, 09:25
all coffee mixtures sold in a store contain colombian, jamaican, brazilian coffee or some combination of these. Of all mixtures, 33 contain colombian coffe, 43 contain jamaican coffee, and 42 contain brazilian. Of these, 16 contain at least colombian and jamaican, 18 contain at least jamaican and brazilian and 8 contain atleast brazilian and colombian, and 5 contain all three . how many different coffee mixtures are there?