# math

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Mrs.fairweather has placed 10 tiles in a bag.one are red,some are blue,and some are yellow.how 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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