An analyst will recommend a combination of 3 industrial stocks, 2 transportation stocks, and 2 utility stocks. If the analyst can choose from 4 industrial stocks, 5 transportation stocks, and 3 utility stocks, how many different combinations of 7 stocks are possible?\n--\nOptions:\n(A) 12\n(B) 19\n(C) 60\n(D) 180\n(E) 720 OK. Let's think. Some random thoughts first:
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4C3 * 5C2 * 3C2 = 4*60*3 = 720. The answer: (E).
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