Question

The mean of the numbers 11. 13. 17. 15 and 40 is
a)
13
b
17.3
c)
19.2
d)
13.6​

Answer 1

Given:

The numbers are 11, 13, 17, 15 and 40.

To find:

The mean of the given numbers.

Solution:

Mean of the given numbers will be the sum of numbers divided by the total count of numbers given. Mean gives us the average value if the data.

Here the count of numbers given in the question is 5.

In this case mean will be as follows:

Mean = (11+13+17+15+40) / 5

= 96/5

= 19.2

Therefore the mean value of the given numbers is 19.2 and the correct option is C.

Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

The mean of the numbers 11 , 13 , 17 , 15 and 40 is

a) 13

b) 17.3

c) 19.2

d) 13.6

FORMULA TO BE IMPLEMENTED

For a given set of numbers Mean is obtained using the formula

$\displaystyle \sf{Mean = \frac{ Sum \: of \: the \: observations \: }{ Number \: of \: observations }}$

EVALUATION

Here the given observations are

11 , 13 , 17 , 15 and 40

Number of observations = 5

Sum of the observations

= 11 + 13 + 17 + 15 + 40

= 96

∴ Mean

$\displaystyle \sf{ = \frac{ Sum \: of \: the \: observations \: }{ Number \: of \: observations }}$

$\displaystyle \sf{ = \frac{96}{5} }$

$\displaystyle \sf{ = 19.2}$

FINAL ANSWER

Hence the correct option is c) 19.2

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