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Applications (Word Problem)

The mean of x...

Question

The mean of x, x+1, x+2 is 9, the value of x is:

A

4

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B

5

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C

7

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D

8

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Solution

The correct option is D 8
$\frac{(x + x + 1 + x + 2)}{3} = 9 3 x + 3 = 27 3 x = 24 x = 8$

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