Question

Find the A.M. of 5, 10, 15, 20, 30, 45, 15
A) 10
B) 20
C) 30
D) 40​

Answer 1

Step-by-step explanation:

the A.m. is B)20 because= 5+10+15+20+30+45+15

7

= 20

Answer 2

The required A.M = 20

Given :

The observations 5, 10, 15, 20, 30, 45, 15

To find :

The A.M

Solution :

Step 1 of 2 :

Write down the sum of observations

Here the given observations are 5, 10, 15, 20, 30, 45, 15

Number of observations = 7

Sum of the observations

= 5 + 10 + 15 + 20 + 30 + 45 + 15

= 140

Step 2 of 2 :

Find the arithmetic mean

The required arithmetic mean

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

$\displaystyle \sf{ = \frac{140}{7} }$

$\displaystyle \sf{ = 20}$

Hence the correct option is B) 20

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