The marks in a subject for 12 students are as follows:
31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29
For the given data, find the
(a) Range (b) Mean
(c) Median (d) Mode
a) Range = highest marks–lowest marks
= 42–17
= 25
b) Mean = 
Sum of values = 31 + 37 + 35 + 38 + 42 + 23 + 17 + 18 + 35 + 5 + 35 + 29
= 345
Number of values = 12
Mean = 
= 28.75
c) Median
1st arrange data in ascending order
17, 18, 23, 25, 29, 31, 35, 35, 35, 37, 38, 42
For even number of terms
Median = mean of 
and 
term
Median = mean of 6th and 7th term
= 
= 33
d) Mode
It is the marks which is obtained by maximum students
Mode = 35 (Comes for 3 students)
Couldn't generate an explanation.
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