Divide $100 among W,X in the ratio 3:7. How many $ that X get?	Choices
A) $40 B) $50 C) $60 D) $70 E) $80
Sum of ratio terms = 3+7= 
<gadget id="calculator">3+7</gadget>
<output>10</output>
10   X= 100*7/10= 
<gadget id="calculator">100*7/10</gadget>
<output>70</output>
$70   Answer is $70
<result>D</result>
Divide $100 among W,X in the ratio 3:7. How many $ that X get?