Question

The marks of 12 students is 31,37,35,38,42,23,17,18,35,25,35,29.Find
a) range
b) mean
c) median
d) mode​

Answer 1

Step-by-step explanation:

Rearranging the data into ascending order, we get

17, 18,23,25,29,31,35,35,35,37,38,42

Here,

(a) Range= greatest observation - lowest observation

= 42 - 17 = 25

(b) Mean = Sum of observation ÷ number of observations

= 17+ 18+23+25+29+31+35+35+35+37+38+42/12

=365/12 = 30.41

(c) Since the total number of observation is even

Median = 31+35/2 = 66/2

= 33

(d) The mode is 35 because it occurs most frequently i.e., 3 times.