Systolic BP of a group of person follows normal distribution curve. The mean BP is 120. The values above 120 are:: (A) 25%, (B) 75%, (C) 50%, (D) 100%
Answer is C. Ans. is 'c' i.e. 50% in the normal distribution curve 50% of values lies on either side of the mean .Therefore values lying above 120 (which is the mean B.R) are 50%