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) 6-Feb, (B) 5-Mar, (C) 2-Jan, (D) 25-Jun
Answer is B. 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.