Rachel buys a new CD, on which is her favourite track, 8 other tracks she likes and 2 tracks that she does not like. She sets her CD player to play at random. What is the probability that the first track it plays is a track she just likes?

Question

Mathematics

Alvin Garcia

20 September, 22:57

Rachel buys a new CD, on which is her favourite track, 8 other tracks she likes and 2 tracks that she does not like. She sets her CD player to play at random. What is the probability that the first track it plays is a track she just likes?

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Answers (2)

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Benitez · Answer 1

She has a 73% chance that the first track she plays is a track she likes. Because there are a total of 11 tracks. One track that's her favorite, 8 that she likes and 2 she dislikes which is a total of 11. Then divide 8 by 11 and you get 0.72727272 and so you round and convert it into a percentage which is equal to 73% which also equals to 8/11 chance.

Ash · Answer 2

1+2+8 = 11

And she likes 8 out of the 11 tracks

So the probability is 8/11 or about 73%