A room contains 100 people, 20 percent of whom are women. A group of people, 30 percent of whom are women, leaves the room. Of the people remaining in the room, 10 percent are women. How many people left the room?  Options:
A) 50	B) 40	C) 30	D) 20	E) 10
(1) 100 total = 20% women ~ 20 women   (2) x left = 30% x women   (3) 100-x left in the room = 10%(100-x) women   --&gt; (1)=(2) + (3)   --&gt; 30% x + 10%(100-x) = 20   --&gt; 20% x = 10   --&gt; x = 50   50nswer is 50
<result>A</result>
A room contains 100 people, 20 percent of whom are women. A group of people, 30 percent of whom are women, leaves the room. Of the people remaining in the room, 10 percent are women. How many people left the room?