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Answer:
Choice A.
Explanation:
Begin by calculating the probability of side effects for adults and children.
P(side effects) = # of those with side effects / total.
Therefore:
P(side effects | child) = 20/50 = 0.40.
P(side effects | adult) = 6/50 = 0.12.
The answer choice that correctly shows the probabilities of adults and children having side effects is choice A. The values are equivalent, and the statement is valid: Children have a much greater chance of having side effects than adults because 0.40 > 0.12.