P, Q and R have Rs.7000 among themselves. R has two-thirds of the total amount with P and Q. Find the amount with R? Choose the correct option:  A) rs . 3000  B) rs . 3600  C) rs . 2400  D) rs . 2800  E) none of these

Rationale: "let the amount with r be rs . r r = 2 / 3 ( total amount with p and q ) r = 2 / 3 ( 7000 - r ) = > 3 r = 14000 - 2 r = > 5 r = 14000 = > r = 2800 . answer : d"
Answer: D