Maharashtra State Board course SSC (English Medium) Class 9
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The Mean of Nine Numbers is 77. If One More Number is Added to It Then the Mean Increases by 5. Find the Number Added in the Data. - Algebra

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ConceptMeasures of Central Tendency

Question

The mean of nine numbers is 77. If one more number is added to it then the mean increases by 5. Find the number added in the data.

Solution

We have, the mean of nine numbers is 77.
The sum of nine numbers = 77 x 9 = 693.
The new mean when one more number is added to it = 77 + 5 = 82.
The sum of ten numbers = 82 x 10 = 820.
So, the number added in the data = 820 - 693 = 127.

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Solution The Mean of Nine Numbers is 77. If One More Number is Added to It Then the Mean Increases by 5. Find the Number Added in the Data. Concept: Measures of Central Tendency.
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