Tally Marks & Frequency Table

Q1. The weekly wages (in ₹) 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, 840
Using tally marks make a frequency table with intervals as 800–810, 810–820 and so on.
Draw a histogram for the frequency table made for the data answer the following questions:

1. Which group has the maximum number of workers?
2. How many workers earn 850and more?
3. How many workers earn less than 850?