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Questions  

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

a
9
b
10.5
c
12.67
d
14.76

detailed solution

Correct option is C

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) = 5th term = 50 M.D. =xi−Men=1149=12.67

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