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Statement of a problem № m570

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In the layout of a printed circuit board for an electronic product, there are 12 different locations that can accommodate chips. (a) If five different types of chips are to be placed on the board, how many different layouts are possible? (b) If the five chips that are placed on the board are of the same type, how many different layouts are possible?

Solution:
In the layout of a printed circuit board for an electronic product, there are 12

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