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The mean of 10 number if 55 if one number is excluded there mean becomes 50 find the excluded number

Posted by Sandeep Bansal 8 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Rashmi Bajpayee 8 years, 9 months ago

Mean = Sum of 10 numbers/10

Sum of 10 numbers = 55 × 10 = 550

Second condition

Sum of 9 numbers = 50 × 9 = 450

Excluded number = 550 - 450 = 100

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CBSE > Class 09 > Mathematics