The number of customers surveyed is 499.
UESTION A
ehe age ranges that fall within the required one for this question are 20-29, 30-39, and 40-49.
The number of people in these groups in total will be:
Therefore, the probability of this occurring is calculated to be:
he probability is 0.4449.
QUESTION B
he age ranges for this question are >≥60, <20, and 20-29.
The number of people in these groups in total will be:
he probability is 0.4850.
QUESTION C
is ≥60.
The number of people in this group is 84.