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ineemorehelp
02.09.2020 •
Mathematics
A bag contains 16 socks. One sock is chosen at random. The probability of selecting a black, white, or gray sock is 1. The probability of selecting a white sock is 3 4 . Selecting a gray sock is less likely than selecting a black sock. Which statements describe the situation? Choose all the correct answers.
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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
Ответ:
6000+5%=6300
so 6300 is the answer