A teacher writes the name of each of her 25 students on a slip of paper and places the papers in a box. To call on a student, she draws a slip of paper form the box. Each paper is equally likely to be drawn, and the papers are replaced in the box after each draw.
If there are 9 students in the last row, what is the probability of calling on a student in the last row?
a.
0.0016
c.
0.56
b.
0.36
d.
0.04

Question

A teacher writes the name of each of her 25 students on a slip of paper and places the papers in a box. To call on a student, she draws a slip of paper form the box. Each paper is equally likely to be drawn, and the papers are replaced in the box after each draw.
If there are 9 students in the last row, what is the probability of calling on a student in the last row?
a.
0.0016
c.
0.56
b.
0.36
d.
0.04

anonymous · Answer

i believe that first you would have to get the probability of the teacher choosing any of those nine people out of the 25

anonymous · Answer

so you would find the probability of choosing 9 out of 25

anonymous · Answer

because it is asking what is the probability of choosing from the back row of the entire class

anonymous · Answer

then you will have to find the probability of choosing one of those nine