How to figure out Interquartile Range?

Beanie

New member
Your sample is (50, 50, 51, 55, 57, 65, 69, 82). What is the interquartile range?

a) 18
b) 19
c) 14
d) 32
e) 2

Can someone explain to me how they got this answer also?
Thanks
 
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