Answer the questions on the basis of the information given below:
The table below provides certain demographic details of $30$ respondents who were part of a survey. The demographic characteristics are: gender, number of children, and age of respondents. The first number in each cell is the number of respondents in that group. The minimum and maximum age of respondents in each group is given in brackets. For example, there are five female respondents with no children among these five; the youngest is $34$ years old, while the oldest is $49.$
| No. of children |
Male |
Female |
Total |
| 0 |
1 (38, 38) |
5 (34, 49) |
6 |
| 1 |
1 (32, 32) |
8 (35, 57) |
9 |
| 2 |
8 (21, 65) |
3 (37, 63) |
11 |
| 3 |
2 (32, 33) |
2 (27, 40) |
4 |
| Total |
12 |
18 |
30 |
The percentage of respondents aged less than $40$ years is at least ________
- $10\%$
- $16.67\%$
- $20.0\%$
- $30\%$