This legendary question from India's JEE Advanced test is so hard that most people would not even attempt it. Only 78 out of 161,319 were able to correctly solve it.

solution by kludg
https://math.stackexchange.com/questi...
Other solutions
https://byjus.com/questionanswer/let...
   • Let \( |X| \) denote the number of el...  
   • JEE Advanced 2019 Maths Solutions  P...  
Jee Advanced 2019 report
https://jeeadv.ac.in/reports/2019.pdf
Q11, 2019 JEE Advanced Mathematics Paper 2
https://jeeadv.ac.in/past_qps/2019_2_...
Dice
https://commons.wikimedia.org/wiki/Fi...
Iitduser, CC BYSA 4.0 via Wikimedia Commons

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