Question

The marks in a subject for 12 students are as follows:
31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29
Find the range and mode for given data.

Answer 1

Answer:

Step-by-step explanation:

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

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