Answer:
[tex]\frac{5}{24}[/tex]
Step-by-step explanation:
Calculate the number of CD's of the different musical styles
[tex]\frac{1}{6}[/tex] × 72 = [tex]\frac{72}{6}[/tex] = 12 ← dance CD's
[tex]\frac{1}{4}[/tex] × 72 = [tex]\frac{72}{4}[/tex] = 18 ← hip hop CD's
[tex]\frac{3}{8}[/tex] × 72 = 3 × 9 = 27 ← reggae CD's
total = 12 + 18 + 27 = 57
number of rock CD's = 72 - 57 = 15
fraction of rock CD's = [tex]\frac{15}{72}[/tex] = [tex]\frac{5}{24}[/tex]
