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6. Joel works at a local music store. There are 20 country C.D.s, 15 rock C.D.s, and four hip hops C.D.s. What is the probability that the first CD Joel chooses from the box will be rock?
A.4/39 B.5/13 C.20/39 D.1
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Answer:-

  • Country CDs=20
  • Rock CDs=15
  • Hip Hop CDs=4

Total CDs=20+15+4=39

[tex]\boxed{\sf P(R)=\dfrac{No\:of\:Rock\:CDs}{Total\:CDs}}[/tex]

[tex]\\ \sf\longmapsto P(R)=\dfrac{15}{39}[/tex]

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