Henry finds that the interquartile range in a data set is 35, and the lower quartile range is 12. Find the value of the upper quartile.

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Solution

The correct option is B 47
Interquartile range $= 35$
Lower quartile $(Q 1) = 12$
We know that,
Interquartile range $= Q 3 - Q 1$
$35 = Q 3 - 12$
$Q 3 = 35 + 12 = 47$
Upper quartile $(Q 3) = 47$

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(iii) Upper quartile

(iv) Interquartile range.

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