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Lower quartile , upper quartile and interquartile range are `Q_(1) , Q_(3)` and `Q` . If the average of `Q , Q_(1) ` and `Q_(3)` is 40 and semi-interq

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Lower quartile , upper quartile and interquartile range are `Q_(1) , Q_(3)` and `Q` . If the average of `Q , Q_(1) ` and `Q_(3)` is 40 and semi-interquartile range is 6 , then find the lower quartile .
A. 24
B. 36
C. 48
D. 60
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Correct Answer - c
Semi-interquartile range = `(Q_(3) - Q_(1))/(2)` .
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