Answer:
50/100 or 1/2
Explanation:
A 50-50 chance that a randomly selected adult has pierced ears means there's is a 50 percent probability of randomly selecting an adult that has pierced ears. In other words, there is half chance of selecting such an adult. A zero or one probability means there is either no possibility of selecting an adult with pierced ears or it is sure that a random adult would have pierced ears
