A **histogram** is a type of bar graph that represents the frequency of data that has been grouped in several intervals.

Read the histogram and answer the following questions:

- How many workers are in the maximum salary group? 5 workers.
- In which salary group are the maximum workers? 930-940.
- What is the size of each class? 10.
- How many workers get less than $930? 55 workers.
- How many get $930 or more? 70 workers.
- What is the total number of workers? 125 workers.