BNM/Chapter5/part2/ arithmetic mean, indirect method and step deviation method.

[@priyars2613]

👍👍

[@gokulas1547]

Thanks a lot

[@binduk2057]

Tnx😁🥹

[@Christiano.__ronaldo__7___.j]

C engana kittane

[@devooteofmusic5400]

Common difference

[@Christiano.__ronaldo__7___.j]

Thank you....​@@devooteofmusic5400