Answer:
The number of the students who got selected are 4,13,22,31.
Step-by-step explanation:
The professor wants to select 4 students randomly.
She randomly select the fourth and every ninth student after that
First the 4th student is selected
Now by using the next term formula which is
=>a + d(n-1)
The next student is the 2nd student.
=>4 + 9(2-1)
=>4 + 9(1)
=>4 + 9
=> 13
The 3rd student will be
=>4 + 9(3-1)
=>4 + 9(2)
=>4 + 18
=> 22
The 4th student will be
=>4 + 9(4-1)
=>4 + 9(3)
=> 4+ 27
=> 31
