Respuesta :

Answer:

4

Step-by-step explanation:

mean = total / number of participants

mean = 3

total = 1+4+3 +? = 8 +?

number = 4

Answer:

x = 4

Step-by-step explanation:

M = (1 + 4 + 3 + x)/4

3 = (1 + 4 + 3 + x)/4

12 = 1 + 4 + 3 + x

12 = 8 + x

x = 12 - 8

x = 4

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