This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
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 
Select and explain. 
A. 2\/6, B. 3\/5, C. 1\/2, D. 6\/25
A: 2\/6
Answer: A: 2\/6 
Explanation: <p> 2/6. Reference:Text of preventive and social medicine,K.Park,20th edition,page no:755. <\p>