there are 30 students in a classroom. The ratio of the # of girls to boys was 1:2, how many boys are there?	Choose one:
A) 10
B) 15
C) 20
D) 25
E) 30
# OF GIRLS = X   # OF BOYS =2X   X + 2X = 30   3X = 30   X = 30/3= 
<gadget id="calculator">30/3</gadget>
<output>10</output>
10   BOYS= 2X = 2 * 10= 
<gadget id="calculator">2 * 10</gadget>
<output>20</output>
20   ANSWER: 20
<result>C</result>
there are 30 students in a classroom. The ratio of the # of girls to boys was 1:2, how many boys are there?