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The Mean of 15 Observations is 32. Find the Resulting Mean, If the Observation Is: Decreased by 20%

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Question

The mean of 15 observations is 32. Find the resulting mean, if the observation is: Decreased by 20%

Sum
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Solution

Given that the mean of 15 observations is 32

resulting mean decreased by 20%

= 32 - `( 20 ) / (100 ) xx 32 `

= 32 - 6.4

= 25.6

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Properties of Mean
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Chapter 18: Mean and Median [For Ungrouped Data Only] - Exercise 18 (A) [Page 265]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 18 Mean and Median [For Ungrouped Data Only]
Exercise 18 (A) | Q 8. (vi) | Page 265
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