Albert is 2 times Mary’s age and 4 times as old as Betty. Mary is 12 years younger than Albert. How old is Betty?	Choose the most appropriate option.
A) 6  B) 12  C) 10  D) 15  E) 18
6 = 2M = M+12= 
<gadget id="calculator">+12</gadget>
<output>12</output>
12   6= 24   6 = 4B, and so B = 6   The answer is 6.
<result>A</result>
Albert is 2 times Mary’s age and 4 times as old as Betty. Mary is 12 years younger than Albert. How old is Betty?