Question 1194319
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Suppose you are going to randomly sample 1 individual from a population of 140 people. 
In the population, there are 50 children younger than 12, 70 teenagers, and 40 adults. 
What is the probability the individual you select will be a teenager or an adult?
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50 + 70 + 40 = 160,  which is not  140.



Are you sure you correctly use the numbers ?