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