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: (A) 2\/6, (B) 3\/5, (C) 1\/2, (D) 6\/25
Answer is A. <p> 2/6. Reference:Text of preventive and social medicine,K.Park,20th edition,page no:755. <\p>