In a Express Train passengers traveling in A.C. Sleeper Class, First Class and Sleeper Class are in the ratio 1:2:3, and fare to each class in the ratio 5:4:2. If the income from this train is Rs. 57000, the income of A.C. Sleeper Class is
Select:  A) rs . 8000  B) rs . 12000  C) rs . 15000  D) rs . 6000  E) none

Rationale: income is divided in the ratio 1 × 5 : 2 × 4 : 3 × 2 = 5 : 8 : 6 . now 5 x + 8 x + 6 x = 19 x = 57000 . ∴ x = 3000 . therefore income from a . c . sleeper class = 30005 = 15000 . answer : c .
Answer: C