gavincoscarat760
19.08.2019 •
Mathematics
Simplify the expression: 9squareroot72
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Ответ:
9*√(2*36)
9*√(2)*√(36)
9*√(2)*6
9*6*√(2)
54√(2)
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