Question

2. The marks obtained by 12 students in an examination (out of 50) are given below:
18, 35, 2, 27, 40, 0, 21, 33, 27, 8, 36, 23
Find the mean marks.
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Answer 1

Answer:

First add up all the numbers

$18 + 35 + 2 + 27 + 40 + 0 + 21 + 33 + 27 + 8 + 36 + 23 = 270$

Now divide the sum (270) by the total number of the values which is

12

$270 \div 12 = 22.5$

Mean= 22.5

Answer 2

Answer:

27

Step-by-step explanation:

(arrange in ascending order)

0,2,8,18,21,23,27,27,33,35,36,40

Mean=

${n + 1 \div 2}^{th}$

=12+1 /2

=13/2

=6 1/2

On the 6 1/2=27