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------------------------------------------------ Find the value of \( x \) such that the data set has a mean of 103.

\[ 99, 122, 103, 113, 109, x \]

Answer :

That means the average of all data point equal:

(99+122+103+113+109+x)/6 = 103
===> (546+x)/6 = 103===> 546+x=618 & x=618-546=72, so x =72

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