Question

4. The marks in a subject of 12 students are as follows:
31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29
Find the mean, median and mode of the data.​

Answer 1

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

ANSWER

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 observations ÷ number of observations

=

12

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

=

12

365

=30.41

(c) Since the total number of observations is even

Median =

2

31+35

=

2

66

=33

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

Answer 2

Answer:

30=41666

Step-by-step explanation:

(31+37+35+38+42+23+17+18+35+25+35+29)/12=365/12

=30.4166