Probability
Zuzana has 5 folders 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 the rock song plays first with a probability of 21% when the random play 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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