If the mean of 6, 8,5,X,4,7,8 is 7 , Find X
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If the mean of 6, 8,5,X,4,7,8 is 7 , Find X
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Step-by-step explanation:
Mean= sum of all observation/ No. of observations
mean = 7
6+8+5+X+4+7+8 / 7= 7
28 + x/ 7 = 7
28 + x = 49
x = 49- 28
x = 21