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P. 2
Marks Number of Students
0 - 10 10
10 - 20 P
20 - 30 25
30 - 40 30
40 -50 Q
50 - 60 10
Total 100
Ans:p=6, q=19
7. Compute the median of the following data.
Marks Below 10 Below 20 Below 30 Below 40 Below 50 Below 60
No. of students 3 12 27 57 75 80
Ans:34.33
8.Compute the missing frequencies pand q in the following data if the median of the data is
28.5 and sum of the observations is 60
Classes 0 - 10 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60
Frequency 5 p 20 15 q 5
Ans:8, 7
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