A store gathers some demographic information from their customers. The following chart summarizes the age-related information they collected:
A store gathers some demographic information from their customers. The following chart summarizes the age-related information they collected:
One customer is chosen at random for a prize giveaway.
What is the probability that the customer is at least 20 but no older than 40?
What is the probability that the customer is either older than 60 or younger than 40?
What is the probability that the customer is at least 60?
Enter your answers as either decimals or fractions, not as percents.
Homework Answers
Total no. of customers = 100+66+---+97 = 507
1.
Total no. of customers between age group 20 to 40 are 66 + 83 = 149
Probability = 149 / 507 = 0.2939
2.
Customer either older than 60 or younger than 40 = 100+66+83+97 = 346
Probability = 346 / 507 = 0.6824
3.
Customer at least 60 = 97
Probability = 97 / 507 = 0.1913
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