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14 January, 20:29

You have 160 songs on your MP3 player. Ihe probability of randomly choosing a rock song is 30%. How many of the songs on your MP3 player are not rock songs?

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  1. 14 January, 22:16
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    160x. 30=48

    So you have 48 rock songs
  2. 14 January, 23:16
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    Total songs = 160

    probability of randomly choosing a rock song is 30%. This means 30% of your songs are rock songs.

    Number of rock songs = 160 * 30/100 = 48

    So, Number of songs which are not rock songs = 160 - 48 = 112

    Hence, 112 songs on your MP3 player are not rock songs.
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