If the mean of numbers 28, x, 42, 78 and 104 is 62, then what is the mean of 128, 255, 511, 1023 and x?
Solution
Correct Answer: Option A
The new mean =62+{(128+255+511+1023+x)−(28+x+42+78+104)}/5 =62+{(1917+x)−(252+x)}/5
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