The fasting blood levels of glucose for a group of diabetics is found to be normally distributed with a mean of 105 mg per 100 ml of blood and a standard deviation of 10 mg per 100 ml of blood.From this data is can be inferred that approximately 95% of diabetics will have their fasting blood glucose levels within the limits of:

• A. 75 and 135 mgs
• B. 85 and 125 mgs
• C. 95 and 115 mgs
• D. 65 and 145 mgs