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Qian is among 12 students in a class. Three people will be chosen at random from the 12 to lead a group of 4. Find the probability that Qian will be chosen. Convert the fraction to a decimal.

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]