Hello, peachgal!

Edit: Made an *awfu*l blunder in my chart . . . *blush*

. . . I'll correct it now . . .

Quote:

Sandra's music bag contains:

3 CDs of country music

6 CDs of rock and roll

4 CDs of rap music

5 tapes of country music

1 tape of rock and roll

3 tapes of rap music

As Sandra drives, she often reaches into her bag and randomly pulls out some music.

We can organize the information . . .

$\displaystyle \begin{array}{cccccccc}

& | & \text{CD} & | & \text{Tapes} & | & \text{Total} & | \\ \hline

\text{C \& W} & | & 3 & | & 5 & | & 8 & | \\

\text{R \& R} & | & 6 & | & 1 & | & 7 & | \\

\text{Rap} & | & 4 & | & 3 & | & 7 & | \\ \hline

\text{Total} & | & 13 & | & 9 & \ & 22 & |\end{array}$

Quote:

What is the probably that she will select some rap music?

There are 22 units, 7 are Rap music. .$\displaystyle P(\text{Rap}) \:=\:\frac{7}{22}$

Quote:

b) Find P(CD), the probability that she will randomly select a CD.

There are 22 units, 13 are CDs. .$\displaystyle P(\text{CD}) \:=\:\frac{13}{22}$

Quote:

c) Find the probability that she will select a tape of country music.

There are 22 units, 5 are C&W tapes: .$\displaystyle P(\text{C\&W tape}) \:=\:\frac{5}{22}$

Quote:

d) Find the probability that the music she randomly selects is **not **rock and roll.

There are 22 units, 15 are not R & R: .$\displaystyle P(\text{not R\&R}) \:=\:\frac{15}{22}$