math
posted by Carl .
The average of 20,70 and x is 40. If the average of 20,70, x and y is 50, then y=
a. 30
b. 60
c. 70
d. 80
e. 100

math 
Ms. Sue
20 + 70 + x = 120
x = 30
120 + y = 200
y = 80
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