If the mean of first five observation x x+2 x+4 x+6 x+8is 11 find the mean of first three observation
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Given the mean of first five observation x, x+2, x+4, x+6, x+8is 11
Mean = (x+x+2+x+4+x+6+x+8)/5
11= (5x+20)/5
55= 5x+20
55-20=5x
35= 5x
X =7
Therefore x=7
The first three numbers are 7, 9 and 11
Mean = (7+9+11)/3
=27/3
=9
Mean = (x+x+2+x+4+x+6+x+8)/5
11= (5x+20)/5
55= 5x+20
55-20=5x
35= 5x
X =7
Therefore x=7
The first three numbers are 7, 9 and 11
Mean = (7+9+11)/3
=27/3
=9
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