P, Q and R have $7000 among themselves. R has two-thirds of the total amount with P and Q. Find the amount with R?
Options:  A) 2800  B) 2403  C) 3998  D) 2539  E) 1930

Rationale: a 2800 let the amount with r be $ 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: A