Question

In a school, all students receive one of the four grades A, B, C and D. If 1/4 obtain A, 1/2 obtain B, 1/5 obtain C and 20 students receive D. How many students are there in the school ? (I need the steps to get to the answer)​

Answer 1

Answer:

hear is your answer

Step-by-step explanation:

first we will add grades of A,B,C

=1/4+1/2+1/5

=5+10+4/20

=19/20

Thus, remaining 20 grades represent 1/20 grades.

Therefor 20*20=400

so,there are 400 students in class.