Mathematics, 18.03.2021 01:40, skylex

In a group of 23 pupils, 4 play the flute only. 3 play the piano only. 15 play neither instrument. A student is selected at random. What is the probability the student plays both instruments?

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In a group of 23 pupils, 4 play the flute only. 3 play the piano only. 15 play neither instrument. A...