Q.

If the mean deviation about the median of the numbers a,2a,3a,……..50a , is 50 then |a| equals

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a

4

b

5

c

2

d

3

answer is A.

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Detailed Solution

a,2a,−−−−−50a Median=25a+26a2=25.5a M.D=50 .1n∑|xi−Median|=50 150∑|xi−Median|=50 |a|(25)(25)=50×50 |a|=4
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