Answer:A) 57% B) 16% C) 49.2% D) 93.9%
Step-by-step explanation:
.The total number of students in the class was given to be 1000 students. From the long run attendance rate (81%), the number of students that attend the class can be calculated;
The number of students that attend the class regularly = (81/100) *1000 = 810 students
While the number of the students who do not attend the class regularly = 1000-810 = 190 students
A. The number of students that get A’s because they attend regularly
= (57/100) *810 = 462 students (to the nearest integer)
So the percentage of students that get A’s given that they attend the class will be;
= (462/810) *100 = 57%
B. The number of students get A’s but they do not attend the class regularly;
= (16/100) *190 = 30 students (to the nearest integer)
Therefore, the percentage who get A’s given that they do not attend the class regularly is;
= (30/190) *100 = 16%
C. The total number of students who get A’s in the class = 462 +30 = 492 students
The percentage of the total number of students who get A’s in the class is;
= (492/1000) * 100 = 49.2%
D. Based on the fact that they get A’s, the percentage of people who attend the class will be;
= (462/492) *100 = 93.9%
