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IQR of a Boxplot: Mark's Pushups

APSTAT-HLJSYU

Mark started working out, and every day he recorded the number of pushups he could do in a row.

According to the boxplot below, what is the approximate interquartile range (IQR) of the numbers?

A

$20-100$

B

$27-90$

C

$40$

D

$63$

E

$80$