A $500 investment and a $1,500 investment have a combined yearly return of 8.5 percent of the total of the two investments. If the $500 investment has a yearly return of 7 percent, what percent yearly return does the $1 ,500 investment have?
Choices:
A) 9%
B) 10%
C) 10 5/8%
D) 11%
E) 12%
The ratio of investments is 500:1,500 = 1:3.   The deviation from the average return from $500 investment and $1,500 investment must be in the ration 3:1.   $500 investment return has the deviation from the mean of 8.5-7= 
<gadget id="calculator">8.5-7</gadget>
<output>1.5</output>
1.5%, thus $1,500 investment return must have the deviation from the mean equal to 0.5%, which means that $1 ,500 investment has  8.5+0.5= 
<gadget id="calculator"> 8.5+0.5</gadget>
<output>9</output>
9% yearly return.   9%nswer: 9%.
<result>A</result>
A $500 investment and a $1,500 investment have a combined yearly return of 8.5 percent of the total of the two investments. If the $500 investment has a yearly return of 7 percent, what percent yearly return does the $1 ,500 investment have?