Mean age of following distributions is 60 years.Find the value of x.
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x f fx
50 2 100
55 4 220
60 1 60
x+10 2 2x+20
70 3 210
total 12 610 +2x
mean = 60
(610+2x)/12 =60
610+2x= 720
2x = 110
x = 55
50 2 100
55 4 220
60 1 60
x+10 2 2x+20
70 3 210
total 12 610 +2x
mean = 60
(610+2x)/12 =60
610+2x= 720
2x = 110
x = 55
Answered by
3
Answer:
mean is 60 and x = 55
i hope help you
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