The mean of 6, 8, 11, 13, 14 and x is 66. Find the value of the observation x ___.

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Solution

The mean is the average of the numbers.
=> $(\frac{8 + 11 + 6 + 14 + x + 13}{6})$ = 66
=> x = (66 $\times$ 6) - 52
=> x = 344

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