18. I bought a certain number of apples at three for 5 paise, andfive-

1.	18. I bought a certain number of apples at three for 5 paise, andfive-sixths of that number at four for 5 paise;, by selling them ateleven for 20 paise, I gained 15 paaise: how many apples did I buy?
Answer» Let number of apples bought = x Then,Cost price of apples = (x)5/3 + (5x/6)5/4 Selling price of apples= x20/11 As per given condition20x/11 - 5x/3 - 25x/24 = 15(480x - 40x - 275x) = 15264165x = 15264x = 15264/165x = 264/11x = 24 Therefore, total number of apples bought = 24

18. I bought a certain number of apples at three for 5 paise, andfive-sixths of that number at four for 5 paise;, by selling them ateleven for 20 paise, I gained 15 paaise: how many apples did I buy?

Answer»

Let number of apples bought = x

Then,Cost price of apples = (x)*5/3 + (5x/6)*5/4

Selling price of apples= x*20/11

As per given condition20x/11 - 5x/3 - 25x/24 = 15(480x - 40x - 275x) = 15*264165x = 15*264x = 15*264/165x = 264/11x = 24

Therefore, total number of apples bought = 24