Question: Suppose a compact disc (CD) you just purchased has 13 tracks. After listening to the CD, you decide that you like 5 of the songs.

Suppose a compact disc (CD) you just purchased has 13 tracks. After listening to the CD, you decide that you like 5 of the songs. The random feature on your CD player will play each of the 13 songs once in a random order. Find the probability that among the ﬁrst 4 songs played
(a) you like 2 of them;
(b) you like 3 of them;
(c) you like all 4 of them.

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