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Find the Mean 285 , 420 , 345 , 390

$285$ ,

$420$ ,

$345$ ,

$390$

Step 1

The mean of a set of numbers is the sum divided by the number of terms.

$\frac{285 + 420 + 345 + 390}{4}$

Step 2

Simplify the numerator.

Add

$285$ and

$420$ .

$\frac{705 + 345 + 390}{4}$

Add

$705$ and

$345$ .

$\frac{1050 + 390}{4}$

Add

$1050$ and

$390$ .

$\frac{1440}{4}$

$\frac{1440}{4}$

Step 3

Divide

$1440$ by

$4$ .

$360$

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