" 13.What is the class marks of "90-120" ."

What is the class mark of 45-55.

Find the class-mark of 80-90.

What is the class mark of class 45-55 ?

Choose the correct atternative answer for each of the following question: What is the class mark of the class 30-40 ?

What is the class mark of class 25-35?

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

Choose the correct alternative for each of the following questions : What is the class mark of the class 10-100?

Find the class mark of the class 10 -20.

What is the class mark of the class 100 - 190 ?

Observe the following frequency polygon and write the answers of the questions below it. i . Which class has the maximum number of students? ii . Write the classes having zero frequency. iii . What is the class mark of the class, having frequency of 50 students ? iv . Write the lower and upper class limits of the class whose class mark is 85 . v . How many students are in the class 80-90 ?