Biology for SSC|| Digestive System||General Science||Competitive Exam||By-Ravi Sir - Videos

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mixture & alligation part-1= https://youtu.be/H3o0vzvncpY

mixture & alligation part-2= https://youtu.be/N4p_exzErBg

Ratio & proportion part-1 = https://youtu.be/_sBmlayqeqI

Ratio & proportion part-2 = https://youtu.be/mBY8RkHxWbI

jion on Facebook group = https://www.facebook.com/groups/282987405112972/?ref=br_rs

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