Quant module - 2 (overwhlemedplan) doubt

[user1719]

I would like to understand this solution? Please explain in detai
explain.pdf (1.2 MB)

[ganesh]

Can you check this? (I'm Overwhelmed) Arithmetic Progress Quiz #7 - Question 9 - #7 by Leaderboard

Maybe the video explanation is not good

[user1719]

Thanks!!