mean of 10 number is 55 if one number is excluded there mean becomes 50 find the excluded number
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ANSWER...................,
The mean of 10 number = 55
The sum of 10 number = 10 × 55 = 550
If one number is excluded ,
Then mean of 9 number = 50
Sum of 9 number = 9 × 50 = 450
∴excluded number = 550 - 450 =1 00
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