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Mathematical Operations on Expressions

What is the m...

Question

What is the mean of the numbers 5,6 and 7

A

5

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B

4

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C

18

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D

6

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Solution

The correct option is D
6

Mean of a set of numbers if defined as
$Mean = \frac{Sum of the numbers}{Number of numbers}$
Here, the sum of the numbers is 5 + 6 + 7 = 18.
The number of numbers = 3
Thus, $Mean = \frac{18}{3} = 6$ .

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