Problem 1

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 has developed a cold given that he/she has been receiving vitamin C.
                               Status     Vitamin C Group       Placebo Group       Total
       Children free of colds                           21                            11           32
Children developing colds                           36                           35            71
                                 Total                            57                           46          103