Question

If the mean of the observations x , x+3, x+5 , x + 7 , x+10 is 9 .Find x.

Answer 1

Answer:

4

Step-by-step explanation:

Mean=sum of observations/number of observations

Mean =(x+x+3+x+5+x+7+x+10)/5

9*5=5x+25

45=5x+25

45-25=5x

20=5x

4=x

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Answer 2

Answer:

Step-by-step explanation:

mean=sum of observation/number of observations

x+x+3+x+5+x+7+x+10/5=9 as given

5x+25/5=9

x+5=9

x=4

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