Given below is the distribution of marks scored by some students in an examination:

Marks 50-60 60-70 70-80 80-90 90-100
Number of students 10 9 6 3 2

(1)  What is the class size?

(2)  What is the upper limit of the class interval 80-90?

(3)  The results of how many students are recorded here?

Asked by Topperlearning User | 27th Jul, 2016, 08:10: AM

Expert Answer:

(1)  Class size = Upper limit - Lower limit = 60 - 50 = 10

(2)  The upper limit of the class interval 80-90 is 90.

(3)  Total number of students = 10 + 9 + 6 + 3 + 2 = 30

      Thus, the results of 30 students are recorded.

Answered by  | 27th Jul, 2016, 10:10: AM