There are some 1 rupee coin and some 50 paise coin a bag and the total value is 350. but if you remove 1/3 of 50 paise coin and filled with same number of 1 rupee coin and total value will be 400. how many 1rupee cand 50 paise coin were in this bag?
Mathematics has 25%formulas, 25%proofs and apply 25%thinking and 25%efforts.
In real life situations proofs are nothing but already existed stories(we know the solutions from all experienced people).
formulas are nothing but goals. we have so many goals b