[tex]50\%[/tex]
1) In this question, we can tell that each minor mark on the number line corresponds to 4 units. So, we can tell that 44 is in the first quartile, as well as, 76 is in the third quartile.
2) Note that 25% of the data falls below 44 and, on the other hand, 76 is on 75% of the data.
3) So, we can tell that the percentage between the 1st and the 3rd quartile is:
[tex]50\%[/tex]
