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Q.

Following are the marks obtained by 9 students in a mathematics test: 50,69,20,33, 53,39, 40, 65, 59 The mean deviation from the median is

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a

9

b

10.5

c

12.67

d

14.76

answer is C.

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Detailed Solution

Marks obtained by 9 students in Mathematics are: 50, 69,20, 33, 53,39,40,65, 59Let us rewrite the given data in ascending order.20, 33, 39, 40, 50, 53, 59, 65, 69 Here, n=9  [odd]  Median Me=5 th term =50 M.D. =1149=12.67
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Following are the marks obtained by 9 students in a mathematics test: 50,69,20,33, 53,39, 40, 65, 59 The mean deviation from the median is