At Children's General Hospital, 10 out of every 13 babies are crying. If 1 out of every 4 crying babies are hungry, and there are 50 hungry babies crying, how many babies total are there in the hospital?
Options
A) 140	B) 240	C) 50	D) 130	E) 150
Proportions: Let B = babies, and Bc = babies crying, and Bch = hungry babies crying.   50Bch/xBc = 1Bch/4Bc   xBc = 100Bc   100Bc/yB = 10Bc/13B   yB = 130B   Answer: 130
<result>D</result>
At Children's General Hospital, 10 out of every 13 babies are crying. If 1 out of every 4 crying babies are hungry, and there are 50 hungry babies crying, how many babies total are there in the hospital?