Answers

  • Brainly User
2016-05-03T15:45:30+08:00
                       Sum of the values of the items
 Average =   -----------------------------------------
                             Number of items

Let x be the number to be added to given values.

Equation:
      
          x + 45 + 42 + 47 + 38
45 = ---------------------------------
                     5
 
          x + 172
45 = --------------
             5

(5) (45) = x + 172

225 = x + 172

x = 225 - 172

x = 53

ANSWER:  53 must be added to given values to have an average of 45.



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