Inactive Tutor answered • 01/17/17
Tutor
New to Wyzant
the average = sum of the items÷the number of items
so, (x+y+z)/3=80
or,
(74+78+x)/3=80
solve for x
Rudy I.
asked • 01/17/17Problem solving
the averag of x,y,z is 80.If two of the numbers are 74 and 78,then what is the other number?
pls can someone explain that
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