Respuesta :

Answer: 22

Step-by-step explanation:

The mean is the average of the number.

Step 1 : Add up all the numbers

Step 2: Then divide by how many numbers there are

15 + 22 + 19 + 20 + 29 + 18 + 25 + 19 + 31 = 198

198 ÷ 9 = 22

The mean is 22

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