Maisa Maisa
  • 30-08-2015
  • Mathematics
contestada

The mean of a particular set of 7 numbers is 4. Six of the numbers in the set are known: 1,2,2,5,7,and 8.

Identify the missing number.

Respuesta :

konrad509
konrad509 konrad509
  • 30-08-2015
[tex]\dfrac{1+2+2+5+7+8+x}{7}=4\\ \dfrac{25+x}{7}=4\\ 25+x=28\\ \boxed{x=3} [/tex]
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