Question

The class-mark of class 19-30 is ______.

Options

• `(30 + 19)/2`

• `(29.5 - 19.5)/2`

• `(30.5 - 19)/2`

• `(29.5 - 18.5)/2`

Answer 1

The class-mark of class 19-30 is `bbunderline((30 + 19)/2)`.

Explanation:

The class mark represents the exact midpoint of a given class interval and is calculated by finding the average of its lower and upper limits. For the class interval 19-30, the calculation is represented as:

`(19 + 30)/2`