the mean of 11 number is 5 if one more number is added to the collection the new mean of the 12 number would be 7 find the value of the 12 number
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Step-by-step explanation:
mean of 11 numbers = 5
sum of 11 numbers= 11 × 5 = 55
mean of 12 numbers = 7
sum of 12 numbers = 12 × 7 = 84
Excluded number = ( 84 - 55 )
= 29
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