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Sagot :
There are 12 students in a class, Qian has already been chosen. Therefore, we have 11 students left in the class.
The formula for probability is given as,
[tex]\text{Probability}=\frac{\text{Number of students}}{Total\text{ number of students}}[/tex]Therefore, we have the probability of two students out of 11 students which were picked randomly to calculate.
The probability of picking the second person is,
[tex]P(\text{second person)=}\frac{\text{2}}{11}[/tex]The probability of picking the third person is,
[tex]P(\text{third person)=}\frac{\text{1}}{10}[/tex]
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