Probability
Zuzana has 5 playlists with different music styles on her mobile phone. The table shows their names and the number of songs they contain. Fill in the missing number so that a rock song plays first with a probability of 21% when the shuffle function is used.
Music style: Number of songs:
hip hop: 52
jazz: 11
disco: 79
rock: ?
classical music: 16
Music style: Number of songs:
hip hop: 52
jazz: 11
disco: 79
rock: ?
classical music: 16
Final Answer:
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