Question

A mathematics aptitude test of 50 students was recored as follows:

Marks	No. of students
50-60	4
60-70	8
70-80	14
80-90	19
90-100	5

Draw a histrogram for the above data using a graph paper and locate the mode.

Answer 1

1. Draw the histogram
2. In the highest rectangle which represents modal class draw two lines AC and BD intersecting at P
3. From P, draw a perpendicular to x-axis meeting at Q
4. Value of Q is the mode = 82 (approx)