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Mrs.fairweather has placed 10 tiles in a are red,some are blue,and some are many different combination of the colors are possible?

  • math -

    Since it asks for "how many different combinations of the colours are possible"
    we are merely interested in the number of subsets of the 4 colours.
    number of subsets are 2^4 = 16
    but that would include the one case of not choosing any, so
    I would say there are 15 choices of colours

    The answer would be the same if there were 200 tiles, as long as we have some of each of the colours

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