Systolic BP of a group of 200 people follows normal distribution. Mean BP is 120 mm Hg and standard detion 10. Which of the following is true-
68% of people have BP between 110-130 mm Hg 95% of people have BP between 110-130 mm Hg 68% of people have BP between 100-140 mm Hg 99% of people have BP between 100-140 mm Hg