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13 February, 10:33

Simona's music book includes 50 piano tunes, of which 7 are by Bach, and 18 are by Mozart. If Simona chooses a tune at random, what is the probability that it is either by Bach or by Mozart?

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  1. 13 February, 13:59
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    1/2, because there are 25 tunes by Bach or Mozart, and 25/50 simplifies to 1/2
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