The class mark of the class 2000-2500 is taken as assumed mean. What is the value of `d_(i)` (deviation) for the class 2500-3000?

The class mark of the class 280-320 is taken as the assumed mean. What is the value of d_(i) (deviation) for the class 200-240?

Choose the correct alternative for each of the following questions : The class mark of the class 2000-2500 is taken as the assumed mean. What is the value of the deviation d_i for the class 2500-3000?

The class mark of the class 100-120 is

The class mark of the class 100-120 is

The class mark of the class 90-120 is

The class mark of the class 90-120 is

The class mark of the class 150 - 170 is

Class mark of a class is

What is the class mark of the class 80-130?

What is the class mark of class 25-35?