Giving a test to a group of students, the grades and gender are summarized below
A B C Total
Male 8 10 12 30
Female 4 11 3 18
Total 12 21 15 48
If one student was chosen at random,
find the probability that the student got an A.
(total who got A)/(total students)
To find the probability that a student chosen at random got an A, we need to determine the total number of students who got an A and divide it by the total number of students in the group.
Looking at the summarized data, we can see that a total of 12 students in the group got an A. The total number of students in the group is 48.
Therefore, the probability that a student chosen at random got an A is:
P(A) = Number of students who got an A / Total number of students
= 12 / 48
= 1/4
= 0.25
So, the probability that a student chosen at random got an A is 0.25 or 25%.