The mean of eight numbers is 27. If one more number is included, then the mean is 26. Find the included number.
Please answer correctly.
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Hello there !
We know that :
Mean = sum of the terms / no. Of terms
27 = sum of the terms /8
So, sum of the terms = 27 x 8 = 216
Similarly ,
26 = sum of the terms / 9
Sum of terms = 26 x 9 = 234
Hence, the included number will be : 234 - 216
= 18
Happy learning!
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