The ratio of investments of two partners P and Q is 7:5 and the ratio of their profits is 7:12. If P invested the money for 5 months, find for how much time did Q invest the money?
Pick one:  A) 19  B) 17  C) 13  D) 10  E) 12
7*5: 5*x = 7:12   x = 12   Answer: 12
<result>E</result>
The ratio of investments of two partners P and Q is 7:5 and the ratio of their profits is 7:12. If P invested the money for 5 months, find for how much time did Q invest the money?