Question

if fi=20 fixi=5x+25 mean of any dissemination is 5 find x

Answer 1

Given, fi=20
fixi =5x+25
Mean =5
We know that,
Mean =fixi/fi
5=5x+25/20
5×20=5x+25
100=5x+25
100-25=5x
75=5x
75/5=x
15=x
Therefore, x=15
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Answer 2

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