JEE Main 2020 — Functions Question with Solution
JEE Main 2020 (05 Sep Shift 2)
Question
Let and Then the number of elements in the set and is not one-one is
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Show full solutionCorrect answer: 19
Correct answer
19
Step-by-step explanation
only in range function.
Total no of many one function without any condition = 60-24=40.
Number of many one function with 2 is not in range =27-6 =21.
Therefore no of not one-one functions with 2 in range = 40-21=19.
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This is a previous-year question from JEE Main 2020, covering the Functions chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.