Question

the mean of 15 number is 27 . if a number is excluded the mean is reduced by 2 . find the excluded number... ???
please give me answer.....
please​

Answer 1

Mean of 15 numbers is = 27

so,

sum of 15 numbers = 27×15= 405

let the excluded number be x

now,

sum of 14 numbers = 405-x [as 1 is excluded]

$mean = \frac{sum \: of \: 14 \: numbers \: }{14}$

$= \frac{405 - x}{14}$

$= > 27 - 2 = \frac{405 - x}{14}$

$25 \times 14 = 405 - x$

$350 = 405 - x$

$x = 405 -350$

$x = 55$

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mark brainliest

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