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If the mean of 5 observations $x, x+2, x + 4, x+6$ and $x +8$ is 11, then value of x: |
7 43 51 8 |
7 |
The mean of 5 observations x,x+2,x+4,x+6, x+8 = 11 (x + x+2 + x+4 + x+6 + x+8)/5 = (5x+20)/5 = 11 5x+20 = 55 5x = 35 x = 7 The correct option is (a): 7 |
