Twenty people bought raffle tickets, including
two brothers. One ticket is drawn, and then
a...
![Mathematics](/tpl/images/cats/mat.png)
Mathematics, 22.04.2021 23:30, calhountoiyonou0gjb
Twenty people bought raffle tickets, including
two brothers. One ticket is drawn, and then
another is drawn without replacing the first.
What is the probability that both tickets belong
to the brothers?
please help!
![answer](/tpl/images/cats/otvet.png)
Answers: 3
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