if the mean of five observations x, x+2,x+4,x+6,x+6 is 11 find the mean of first three observation
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mean =5x +20/5=11
5x+20=55
x=7
mean =7+9+11/3
=27/3 =9
5x+20=55
x=7
mean =7+9+11/3
=27/3 =9
sonalmishra:
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The mean= Sum of observations/Number of terms
==>(x+x+2+x+4+x+6+x+8)/5 = 11
Predicted the last to be x+8
==> (5x + 20)=11*5
==> 5x = 55 - 20
==> 5x = 35
==> x=35/5
==> x=7
The value of x is 7
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