The mean marks of a group of students is 60. If their marks are 85, 62, 36, 48,72, x , 75, and 39 then find the value of x ? ​

We know that :mean = sum of observationsnumber of observations60 = 85+62+36+48+72+x+75+398480 = 417 + xx = 480 - 417x = 63

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X=-357
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X=-357
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