To find out how many people who are 40 or younger have no opinion, we need to look at the age groups included in that category, which are 21-30 and 31-40.
From the table:
- For the age group 21-30, there are 18 people with no opinion.
- For the age group 31-40, there are 25 people with no opinion.
Now we add these two amounts together:
18 (from 21-30) + 25 (from 31-40) = 43
Therefore, the total number of people who are 40 or younger and have no opinion is 43.