Question

A group of students was surveyed in a middle school class. They were asked how many hours they work on math homework each week. The results from the survey were recorded.

Number of Hours Total Number of Students
0 1
1 3
2 2
3 10
4 9
5 7
6 3


Determine the probability that a student studied for exactly 4 hours. Round to the nearest hundredth.
0.74
0.35
0.26
0.11
PLEASE HELP ASAP!!!!!

Answer 1

To determine the probability that a student studied for exactly 4 hours, we need to divide the number of students who studied for 4 hours by the total number of students surveyed.

From the given data, we can see that the total number of students surveyed is:

1 + 3 + 2 + 10 + 9 + 7 + 3 = 35

And the number of students who studied for 4 hours is:

9

Therefore, the probability that a student studied for exactly 4 hours is:

9/35 = 0.26 (rounded to the nearest hundredth)

So the correct answer is 0.26.