NIMCET 2015 Question Paper with solutions

Question : 28 of 120

Marks: +1, -0

The number of one-to-one functions from {1, 2, 3} to {1, 2, 3, 4, 5} is;

Solution:

Let A ={12.3} and B ={1,2,3 4,5}
∴ Number of one-to-one function is

^5P_3=5!/2!=60

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