Question

The class-mark of the class 130-150 is ___________.

Answer 1

The mid-value of a class is called the class mark.

The given class is 130–150.

∴ Class-mark of the given class $=\frac{130+150}{2}=\frac{280}{2}=140$

Thus, the class-mark of the class 130–150 is 140.

The class-mark of the class 130–150 is ___140___.