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llama1314
05.03.2021 •
Mathematics
4x - 6y = -26 2x - 3y= -13
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Ответ:
On your first pick, the chance of picking a white sock is 711 (there are 11 socks in total). On the next selection, the chance of picking white is 610 ( 1 white sock has been removed). So the chance of 2 whites is 711×610 which is 42110
Similarly, the chance of picking two blacks is 411×310 which is 12/110
The chance of picking two equal socks is the sum of these probabilities, that is: 54/110
This simplifies to 27/55