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JAMB Economics 2019 Paper

Question : 11

Total: 80

The arithmetic mean of 5, 8, 10, 15, 24 and 28 is_______

Solution:

Concept:

The arithmetic mean is the sum of all values divided by the number of values.

Explanation:

Use the formula:

\text{Mean} = \frac{\text{Sum of observations}}{\text{Number of observations}}

The observations are

5

8

10

15

24

, and

28

Number of observations,

N = 6

Sum of observations:

5 + 8 + 10 + 15 + 24 + 28 = 90

Mean

= \frac{90}{6} = 15

Answer:

The arithmetic mean is

15

, which is Option B.

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