Asked by Oscar
the average (arithmetic mean) of a and b is 6 and the average of a, b, c is 11. What is the value of c?
Answers
Answered by
Reiny
(a+b)/2 = 6
a+b = 12
(a+b+c)/3 = 11
a+b+c = 33
12+c = 33
c = 21
a+b = 12
(a+b+c)/3 = 11
a+b+c = 33
12+c = 33
c = 21
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