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Mathematics

Answered

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

Answer :

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Answer:

9

Step-by-step explanation:

[tex]mean = \frac{5 + 7 + 7 + x}{4} = 7[/tex]

Solving for x,

x = 9

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