Mathematics · Relations and Functions

Set P has 4 elements and set Q has 5 elements. How many injective functions (one-to-one mappings) can be defined from P to Q?

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120

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Set P has 4 elements and set Q has 5 elements. How many injective functions (one-to-one mappings) can be defined from P to Q?

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Set P has 4 elements and set Q has 5 elements. How many injective functions (one-to-one mappings) can be defined from P to Q?

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