A bag has 9 green balls and 23 pink balls. How many green balls should be added to the bag so that the ratio of green balls and pink balls in the bag becomes 1:1?
Choose the correct choice from the following options.
A) 10
B) 11
C) 12
D) 13
E) 14
Suppose x green balls need to be added.   Then, the number of green balls becomes 9 + x, and the number of pink balls remains the same, 23.   But now the ratio of green and pink balls is 1:1   This means,   (9 + x)/23 = 1/1   Solving this we get x = 14.   Ans 14
<result>E</result>
A bag has 9 green balls and 23 pink balls. How many green balls should be added to the bag so that the ratio of green balls and pink balls in the bag becomes 1:1?