If 25% of the item are less than 20 and 25% are more than 40, the quartile deviation is

If 25% of the item are less than 20 and 25% are more than 40, the quar

1.	If 25% of the item are less than 20 and 25% are more than 40, the quartile deviation is
A.	20
B.	30
C.	40
D.	10
Answer» E.

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If 25% of the item are less than 20 and 25% are more than 40, the quartile deviation is

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