Question

rohit donated 1/5 of his monthly income to an non-government organisation (ngo) working for education of girl child,spent 1/4 of his salary on food ,1/3 on the rent and 1/15 on other expenses .he is left with rs 9000

Answer 1

let salary of rohit = x
donation to ngo's=x/5
money spent for food=x/4
rent =x/3
other expenses=x/15
remaining amount =9000
x-x/5-x/4-x/3-x/15=9000
(60x-12x-15x-20x-4x)/60=9000
(60x-51x/60)=9000
9x/60=9000
x=(9000*60)/9
x=60000
rohith salary= Rs60000