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JEE Main20245 Apr 2024Morning ShiftMathematicsFunctionsActual

Let A= 1,3,7,9,11 and B= 2,4,5,7,8,10,12 . Then the total number of one-one maps f: A B , such that f(1)+f(3)=14 , is :

Options

  1. A480
  2. B240
  3. C120
  4. D180

Correct answer

B. 240

Step-by-step solution

aligned & A= 1,3,7,9,11 & B= 2,4,5,7,8,10,12 & f(1)+f(3)=14 aligned (i) 2+12 (ii) 4+102 (2 5 4 3)=240

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