The weekly wages (in Rs) of 30 workers in a factory are.830, 835, 890, 810, 835, 836, 869, 845, 898, 890, 820, 860, 832, 833, 855, 845, 804, 808, 812, 840, 885, 835, 835, 836, 878, 840, 868, 890, 806, 840Using tally marks make a frequency table with intervals as 800–810, 810–820 and so on.

Explanation

To create a frequency table using tally marks for the weekly wages of 30 workers, we will follow these steps:

### Step 1: Define Class Intervals
We need to define the class intervals based on the given data. The intervals will be:
- 800–810
- 810–820
- 820–830
- 830–840
...