ibm - a person has rs 100 in his pocket he can as 25 pens or 15 books he kept 15 of the money for traveling expenses and purchased 5 pens so how many books he can purchase with the remaining money - skillgun

cost of 15 books is 100 rupee
so cost of 3 books is 20 rupee
and cost of 25 pens is 100 rupee
so cost of 1 pen is 4 rupee
traveling expenses = 15 % = 15 rupee
cost of 5 pen = 5*4 = 20 rupee
remaining amount = 100 - 35 = 65 rupee
cost of 9 books is 20*3 = 60 rupee
so total 9 books can be purchased and 5 rupee will remained.