Suppose I ask each student in both of my sections to ask how long it took them to do the last homework assignment.Their answers ranged from 1-4 hrs, with the frequencies displayed in the table below:

Time

1

2

3

4

Count

50

20

20

10

Using the table, answer questions 1- 4:

1.What is the probability that a student works at least 2 hours on the homework?

2.What is the probability that they work only 1 hour on the homework?

3.Given that the student worked at least 2 hours on the homework, what is the probability that they worked 3 hours?

4.Given that a student worked at least 2 hours on the homework, what is the probability that they worked2 hours?

5.What is the sample space for observing the grade level oftwo undergraduate students?