SOLUTION: The ratio of boys to girls in a class is 3:4. If 12 more girls join the class, the ratio would bevome 1:2. How many students are currently in the class?

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Question 1108696: The ratio of boys to girls in a class is 3:4. If 12 more girls join the class, the ratio would bevome 1:2. How many students are currently in the class?
Found 3 solutions by josgarithmetic, ikleyn, TeachMath:
Answer by josgarithmetic(39617) About Me  (Show Source):
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3x boys and 4x girls

Two more girls, IF...
%283x%29%2F%284x%2B2%29=1%2F2

6x=4x%2B2
2x=2
x=1

The class currently has 3 boys and 4 girls.


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(NOTE: Misread problem description; should have solved for "12 more girls" instead of "2 more girls".)

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
%283x%29%2F%284x%2B12%29 = 1%2F2


3x*2 = 4x + 12


6x = 4x + 12


2x = 12


x = 6.


Answer.  3*6 = 18 boys and 4*x = 24 girls are in class.

Any other answer is WRONG/INCORRECT.


Answer by TeachMath(96) About Me  (Show Source):
You can put this solution on YOUR website!
42 students in class.
why does this person josgarithmetic keep giving wrong answers?