See attached image. It's not just an answer...it's a full explanation. Please look through it to make sure you understand, and if anything isn't clear, don't hesitate to ask.
20 I think!
Look it up just to be sure
Https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/cc-6th/v/calculating-interquartile-range-iqr
This is a link that I gave to my little sister that helped her understand what interquartile range is. It has an example as well! I hope this helps!
Answer:
C
Step-by-step explanation: