The mean of five numbers is 80, out of which mean of 4 numbers is 46, find the 5th number:

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434

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None of the above

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Solution

The correct option is A None of the above
Since, the mean of five numbers is $80$ , out of which mean of $4$ numbers is $46$
So, the $5 t h$ number
= Sum of $5 t h$ Observation - Sum of 4th Observations
$= (80 \times 5) - (46 \times 4)$
$= 400 - 184 = 216$
Disclaimer: The options provided are all incorrect.

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