JEE Main 2012 — Permutation Combination Question with Solution
JEE Main 2012 (07 May Online)
Question
If the number of 5-element subsets of the set of 20 distinct elements is times the number of 5-element subsets containing , then is
Choose an option
Show full solutionCorrect option: C
Correct answer
C4
Step-by-step explanation
Set has 20 distinct elements.
We have to select 5-element subset.
Number of 5-element subsets
According to question
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Permutation Combination chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2012, covering the Permutation Combination 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.