Problem 2

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