Explanation:
To answer the questions, you must fill out the table.
a=65+48=113
b=157-65=92
c=92+33=125
d=48+33=81
e=157+81=238 or 113+92=238
5. To find the probability of picking a customer that is lactose intolerant, you need to find the total number of lactose intolerant people out of all the people.
81/238 or 34%
6. To find the probability of randomly picking a customer over 30 years old, you find the total number of people over 30 years old out of all the people.
125/238 or 52.5%
7. This problem specifically asks for people that are not lactose intolerant.
Under 30 years old: 65/157 or 41%
Over 30 years old: 92/157 or 59%
Based on these statistics, is it obvious that it is more likely for a customer to me over 30.