Question

Eighteen students in a class will get this question correct. If that represents 45% of the class, how large is the class?

a. 20

b. 40

c. 60

d. 100

Answer 1

To find the size of the class, we can set up the equation 0.45N = 18 and solve for N. Therefore, the class size is 40.

Step-by-step explanation:

To find the size of the class, we can use the fact that 45% of the class represents 18 students. Let's assume that the total number of students in the class is N. We can set up the equation 0.45N = 18 and solve for N.

0.45N = 18

N = 18 / 0.45

N = 40

Therefore, the class size is 40.