1 Answer

Jinu P C · Answer 1 · 2020-04-22T04:04:01+0000

Answer:

New mean = 8.

Explanation:

Mean = 7.5 and N = 10

$Mean(\bar{X}) = (\sum x)/(N)$

$7.5 = (\sum x)/(10)$

$\sum x = 7.5 * 10 = 75$

Now if number 3 is removed then,

$New \sum x = 75 - 3 = 72$

and n = 10 - 1 = 9 (since 1 number in a series is removed)

$New\ mean = (New \sum x)/(n) = (72)/(9) = 8$

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