Question

There are usually 40 students in the first-period biology class. 1/4 of the class was absent. 1/5 of the students went to the library. 1/8 of the class went to the bathroom. How many students were left in the class?

A. 18 students
B. 20 students
C. 22 students
D. 24 students

Answer 1

To find the number of students left in the class, subtract the number of absent students, students who went to the library, and students who went to the bathroom from the total number of students. So, answer is 8 students.

Step-by-step explanation:

To find the number of students left in the class, we need to subtract the number of absent students, students who went to the library, and students who went to the bathroom from the total number of students.

First, we calculate the number of absent students: 1/4 * 40 = 10 students.

Next, we calculate the number of students who went to the library: 1/5 * 40 = 8 students.

Then, we calculate the number of students who went to the bathroom: 1/8 * 40 = 5 students.

Finally, we subtract the number of absent students, students who went to the library, and students who went to the bathroom from the total number of students: 40 - 10 - 8 - 5 = 17 students.

Therefore, there are 17 students left in the class. The correct answer is A. 18 students.