You are here (click or tap to change) Back to Chapter 3 Main Page
The table below contains data from a study on vitamin C intake in children and the common cold. Find the probability that a randomly selected child from the study developed a cold during the study given that they were taking a placebo.
Status Vitamin C Group Placebo Group Total
Children free of colds 21 11 32
Children developing colds 36 35 71
Total 57 46 103