Income of Avin is 5/8 of the income of Bina. Avin's expenses are one-half of those of Bina, and Avin saves 40% of his income.What percentage of her income does Bina save?
mathematics never dies because it always stays in the minds and souls of people who love mathematics.
Those people will not let maths die instead they will die.................
D . kalyan kumar
mathematics is the indispensible instrument of all physical research