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
<p> 2/6. Reference:Text of preventive and social medicine,K.Park,20th edition,page no:755. <\p>
2\/6
3\/5
1\/2
6\/25
Biostatistics