Mathematics, 22.11.2020 08:40 dinadenoirefan

A class has 17 girls and 4 boys. A teacher needs something from the front office, so selects a student at random to go. Before that student comes back, another teacher drops in and selects another student at random for another task. What is the probability that a girl was selected both times?

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A class has 17 girls and 4 boys. A teacher needs something from the front office, so selects a stude...

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