To find out how many people who are 40 or younger have no opinion, we need to look at the rows for the age groups 21–30 and 31–40.
From the table:
- For the age group 21–30, the number of people with no opinion is 18.
- For the age group 31–40, the number of people with no opinion is 25.
Now, we can add these two numbers together:
18 (no opinion for 21–30) + 25 (no opinion for 31–40) = 43
Therefore, the number of people who are 40 or younger and have no opinion is 43.