Two years ago, P was half of Q's age. If the ratio of their present ages is 3:4 what will be the total of their present ages? Choose the correct choice
A) 3
B) 7
C) 9
D) 1
E) 5
Let present age of P and Q be 3x3x and 4x4x respectively.   Two years ago, P was half of Q's age   â‡’(3xâˆ’2)=1/2(4xâˆ’2)   â‡’6xâˆ’4=4xâˆ’2   â‡’2x=2   â‡’x=1   Total of their present ages   =3x+4x=7x3 +4= 
<gadget id="calculator">3 +4</gadget>
<output>7</output>
7x=7Ã—1=7   7
<result>B</result>
Two years ago, P was half of Q's age. If the ratio of their present ages is 3:4 what will be the total of their present ages?