From a group of boys and girls, 15 girls leave. They are then left 2 boys for each girl. After this, 72 boys leave. There are then 5 girls for each boy. Find the number of girls in the beginning
Choose the most appropriate option:
A) 20	B) 10	C) 30	D) 55	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+72) and number of girls were 5x   Hence, 2(5x) = x + 72   =&gt; 10x = x + 72   =&gt; x = 8   Number of girls in the beginning = (5x + 15) = (5×8 + 15) = 55   Answer is 55.
<result>D</result>
From a group of boys and girls, 15 girls leave. They are then left 2 boys for each girl. After this, 72 boys leave. There are then 5 girls for each boy. Find the number of girls in the beginning