The mean of seven numbers is 96. If an eighth number is a...
The mean of seven numbers is 96. If an eighth number is added, the mean becomes 112. Find the eighth number.
126
180
216
224
Correct answer is D
\(\frac{x}{7} = \frac{96}{1}\) ==> \(\frac{672 + x}{8} = 112\)
Therefore x = 224
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