In a class there are 13 seniors, 9 juniors, 8 sophomores and 5 freshmen. If one student is selected at random from this class, what is the probability that this student is: a) a junior? b) a freshman ?

Respuesta :

Answer:

[tex]P(junior)=\frac{9}{35}[/tex]

[tex]P(freshmen)=\frac{5}{35}=\frac{1}{7}[/tex]

Step-by-step explanation:

In a class there are 13 seniors, 9 juniors, 8 sophomores and 5 freshmen

Total number of students= [tex]13+9+8+5=35[/tex]

one student is selected at random from this class, selected student is Junior

there 9 juniors in the class

[tex]P(junior)= \frac{juniors}{total} =\frac{9}{35}[/tex]

there 5 freshmen in the class

[tex]P(freshmen)= \frac{freshmen}{total} =\frac{5}{35}=\frac{1}{7}[/tex]