Question

The marks of 24 candidates in the subject mathematics are given below:

45	48	15	23	30	35	40	11
29	0	3	12	48	50	18	30
15	30	11	42	23	2	3	44

The maximum marks are 50. Make a frequency distribution taking class intervals 0 - 10, 10-20, .......

Answer 1

The frequency table for the given distribution is

Marks	Tally Marks	Frequency
0 - 10	||||	4
10 - 20	|||| |	6
20 - 30	|||	3
30 - 40	||||	4
40 - 50	|||| ||	7

In this frequency distribution, the marks 30 are in the class of interval 30 - 40 and not in 20 - 30. Similarly, marks 40 are in the class of interval 40 - 50 and not in 30 - 40.