To increase the mean of 4 numbers by 3 , by how much would the sum of the 4 numbers have to increase?
Added by Christopher N.
Step 1
To find the mean, we need to sum up the 4 numbers and divide by 4. Let's say the 4 numbers are a, b, c, and d. The current mean is (a + b + c + d) / 4. Show more…
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