S1,2,3,4,5,6,9 number of elements in the set T=A⊆S:A≠ϕ and the sum of all the elements of A is not

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In this video i am discussing one of the most imortant problem from Permutation and combinations and Sets chapter , it was asked in Jee main 2021.
watch full video and let me know if you understood the method,
Thank you.
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please take pyq from differntial equation from 2023 and 22

SaurabhSingh-inlr
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Sir yeh pnc ka hai yah sets ka?
Sir aur agar yeh pnc ka hai toh sirf sets seh solve nhi ho saktai?

Nananaaaa
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Shocked to see that u posted a video thnk u so much bhaiya

learnangrow_withAditya
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Sir apne jb 3 k multiple likhe to bich m multiply kyu aya

Mene ye socha ki isliye aya for ways

creatorinsider.