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 8
2 2
3 5
4 9
5 7
6 3


Determine the probability that a student studied for exactly 1 hour. Round to the nearest hundredth.
0.03
0.23
0.30
0.77

Answer 1

The probability that a student studied for exactly 1 hour is 0.38. This is calculated by dividing the number of students who studied for 1 hour (8) by the total number of students surveyed (35).

Probability = Number of successful outcomes / Total number of outcomes

= 8 / 35

= 0.23

Answer 2

Second choice

0.23

Explanation:

Total number of students = 1 + 8 + 2 + 5 + 9 + 7 + 3 =35

Out of these 35 students, 8 studied for exactly one hour

P(a randomly picked student studied for exactly 1 hour
= 8/35

= 0.22857

= 0.23 rounded to nearest hundredth

This is the second choice among those provided