From a group of boys and girls, 15 girls leave. They are then left 2 boys for each girl. After this, 45 boys leave. There are then 5 girls for each boy. Find the number of girls in the beginning Choices
A) 20 B) 10 C) 30 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+45) and number of girls were 5x   Hence, 2(5x) = x + 45   =&gt; 10x = x + 45   =&gt; x = 5   Number of girls in the beginning = (5x + 15) = (5×5 + 15) = 40   Answer is 40.
<result>E</result>
From a group of boys and girls, 15 girls leave. They are then left 2 boys for each girl. After this, 45 boys leave. There are then 5 girls for each boy. Find the number of girls in the beginning