If the ratio of age of mother and son 3:5, and the mother is 12 years old, then what will be the age of son?	Choose the correct choice from the following:
A) 20.0
B) 21.1
C) 10.1
D) 15.1
E) 16.2
3 / 5 = 12 / x   x = (5 * 12) / 3= 
<gadget id="calculator">(5 * 12) / 3</gadget>
<output>20</output>
20.0
<result>A</result>
If the ratio of age of mother and son 3:5, and the mother is 12 years old, then what will be the age of son?