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12 observations in a data are written in ascending order. If the last (12th) observation is doubled, the median will increase by ______.

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Question

12 observations in a data are written in ascending order. If the last (12th) observation is doubled, the median will increase by ______.

Options

  • 12

  • 24

  • 0

  • 6

MCQ
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Solution

12 observations in a data are written in ascending order. If the last (12th) observation is doubled, the median will increase by 0.

Explanation:

The median of 12 observations is the mean of the 6th and 7th terms. Doubling the 12th (last) observation only changes the largest value in the dataset and does not affect the middle positions, so the median remains completely unchanged.

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Chapter 18: Mean and Median [For Ungrouped Data Only] - Exercise 18 (B) [Page 267]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 18 Mean and Median [For Ungrouped Data Only]
Exercise 18 (B) | Q 1. (a) | Page 267
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