From a group of boys and girls, 15 girls leave. They are then left 2 boys for each girl. After this, 36 boys leave. There are then 5 girls for each boy. Find the number of girls in the beginning  Pick
A) 20	B) 10	C) 35	D) 50	E) 40
Assume the number of boys at present = x   Then, the number of girls at present = 5x   Before the boys left, the number of boys were (x+36) and number of girls were 5x   Hence, 2(5x) = x + 36   =&gt; 10x = x + 36   =&gt; x = 4   Number of girls in the beginning = (5x + 15) = (5×4 + 15) = 35   Answer is 35.
<result>C</result>
From a group of boys and girls, 15 girls leave. They are then left 2 boys for each girl. After this, 36 boys leave. There are then 5 girls for each boy. Find the number of girls in the beginning