Question

Marks obtained by 65 students are given below. Find median.
marks no of students 20 8
70 11
50 15
60 6
75 9
90 5
40 11

Answer 1

Given : Marks obtained by 65 students

20 8

70 11

50 15

60 6

75 9

90 5

40 11

To Find :  Median

Solution:

Arranging the marks in order and finding CF also

M       f          cf

20     8          8

40     11         19

50     15        34

60     6          40

70     11          51

75     9          60

90      5         65

65/2 = 32.5  Hence median is 33rd score

which is for  50 marks    as    20th to 34th  students have marks 50

 

Median is 50

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