the mean of 5 numbers is 7 if one more number is included the mean increases by 2. find the number included
Mean of 5 numbers = 7
∴Sum of 5 numbers = 7 × 5 = 35
Let the number added be x.
∴Sum of 6 numbers = 35 + x
Mean of 6 numbers = 7 + 2 =9
Therefore, the new number included is 19.
Hope you get it.
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