If 18 is 15 percent of 30 percent of a certain number, what is the number?
সমাধান
সঠিক উত্তর: Option E
Lets assume that number is a 30% of number = a x 30/100 = 3a/10 15% of 3a/10 = 3a/10 x 15/100 = 45a/1000 Given 45a/1000 = 18