If mean of the following distribution is 26, then what is the value of k?
| Class | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
| Frequency | 8 | 10 | k | 6 | 12 |
If A is 70% more than B, then B is what percent less than A?
58 \( \frac{14}{17} \)
38 \( \frac{4}{17} \)
41 \( \frac{3}{17} \)
37 \( \frac{1}{17} \)