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blakelilly22
22.4 im about 58% sure that right
irspow
The "mean" is just the arithmetic average.

The average is just the sum of all elements divided by the number of elements.

In this case:

(22.3+19.7+25.4+n)/4=23.4  combine like terms on left side

(67.4+n)/4=23.4 multiply both sides by 4

67.4+n=93.6 subtract 67.4 from both sides

n=26.2


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