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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9

The median of observation 11, 12, 14, 18, x + 2, x + 4, 30, 32, 35, 41 arranged in ascending order is 24. Find the values of x - Mathematics

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Question

The median of observation 11, 12, 14, 18, x + 2, x + 4, 30, 32, 35, 41 arranged in ascending order is 24. Find the values of x

Sum

Solution

The given observation is 11, 12, 14, 18, x + 2, x + 4, 30, 32, 35, 41 ...(is ascending order)

The number of values = 10

Median = Average of `(10/2)^"th"` and `(10/2 + 1)^"th"` value

= Average of 5th and 6th value

24 = `(x + 2 + x + 4)/2`

24 = `(2x + 6)/2`

2x + 6 = 48

2x = 48 – 6

2x = 42

x = `42/2`

= 21

The value of x = 21

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Chapter 8: Statistics - Exercise 8.2 [Page 284]

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Samacheer Kalvi Mathematics [English] Class 9 TN Board
Chapter 8 Statistics
Exercise 8.2 | Q 3 | Page 284
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