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Question
Let A = {1, 2, 3, …. n} and B = {a, b}. Then the number of surjections from A into B is ____________.
Options
`""^n"P_2`
2n – 2
2n – 1
none of these
MCQ
Fill in the Blanks
Solution
Let A = {1, 2, 3, …. n} and B = {a, b}. Then the number of surjections from A into B is 2n – 2.
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