Asked by Shruti
The average of three numbers is twice the fourth.if the average of these four numbers is 28,find the fourth number?
Answers
Answered by
Steve
(a+b+c)/3 = 2d
(a+b+c+d)/4 = 28
so,
6d + d = 4*28
...
(a+b+c+d)/4 = 28
so,
6d + d = 4*28
...
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