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Finger [1]
3 years ago
12

The mean of four numbers is 7. Three of the numbers are 5, 7, and 7. What is the fourth number? Show your work.

Mathematics
2 answers:
natka813 [3]3 years ago
4 0

Answer:

<h2>4th number = 9</h2>

<u>Step-by-step explanation:</u>

let 4th number = X

mean = 7

observations = 5, 7, 7, X

..............................................

mean = sum of observations ÷ numbers of observations

7 = 5+7+7+X ÷ 4

28 = 19 + X

28 - 19 = X

9 = X

yanalaym [24]3 years ago
3 0

Answer:

the fourth number would be 9

Step-by-step explanation:

the last number  would be 9 because if you know the mean is 7 and there are 4 numbers then you multiply 4*7 then subtract 5, 7 and 7 to get 9

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3 years ago
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