The ratio of investments of two partners P and Q is 7:5 and the ratio of their profits is 7:10. If P invested the money for 7 months, find for how much time did Q invest the money?	Choose the correct option
A) 11 B) 10 C) 18 D) 16 E) 14

Rationale: "7 * 5 : 7 * x = 7 : 10 x = 14 answer : e"
Answer: E