The marks obtained (out of 100) by a class of 80 students are given below:

Construct a histogram to represent the data above

Explanation

Here, the class intervals are of unequal width. So, we shall first input compute adjusted frequencies of each class. The minimum class-size is 20-10=10. The adjusted frequencies are computed by using the following formula
`"Adjusted frequency" = ("minimum class-size")/("class-size") xx "frequency of the class"`

Now, we construct rectangles with class-limits as bases and respective adjusted frequencies as heights.