Social & Preventive Medicine The mean of the 25 plasma volumes is 12.5 litres. Standard detion is 0.25. Calculate Variance:- A 0.0625 B 0.625 C 6.25 D 625 💡 Explanation The mean of the 25 plasma volumes is 12.5 litres. Standard detion is 0.25. Calculate Variance:- ✓ Correct Answer: A. 0.0625