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Functions — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsFunctions2 Marks
Question
Write the total number of one-one functions from set A = {1, 2, 3, 4} to set B = {a, b, c}.
✓

Answer

A has 4 elements and B has 3 elements.
Also, one-one function is only possible from A to B if nA ≤ nB.
But, here nA > nB
So, the number of one-one functions from A to B is 0.

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