if the mean of the observation x,x+2,x+4,x+5 and x+8 is 11, find the value of x
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Step-by-step explanation:
((x + x+2 + x + 4 + x + 5 + x + 8)/5)= 11
5x + 19 = 55
5x = 36
x = 7.2
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