Answer:
Step-by-step explanation:
Calculation is done as follows:
Number of movie posters remaining = 120 - 24 = 96
Number of band posters remaining= x
120:100 = 96:x
x = 80
100-x = 100 - 80 = 20
So, she should sell about 20 band posters for her to maintain the same ratio of the movie posters to the band posters.
