Question

A vendor. Sold 2/5 of fruits to motorists and 1/4 to students. He also sold 3/7 of the remaining fruits to others. If the vendor was left with 168 fruits, how many fruits were sold to students?

Answer 1

find the common denominator

8/20 f + 5/20 f + (3/7 * 7/20 f) + 168 = f

solve for f , 1/4 f was sold to students