This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'On a given day, a hospital had 50 admissions with about 20 girls and 30 boys, out of which 10 girls and 20 boys needed surgery. What is the possibility of picking up a person requiring surgery - \nSelect and explain. \nA. 6-Feb, B. 5-Mar, C. 2-Jan, D. 25-Jun', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 3/5 o Out of 50, 30 (10 girls + 20 boys) persons required surgery. So, every individual has a 30/50 (3/5) chance of having surgery.", 'role': 'assistant'}]