Question

. In an exam, 20% students failed and 400 students passed. Determine the number of students who failed. *please answer it now plzplzplz​

Answer 1

Answer:

In a test, you either pass or fail; 2 possible situations. If 72% of the total students passed. That means 28% of the students failed.

You now have all the ingredients in order to solve this problem. Now set up a proportion,

28/100=392/x28/100=392/x

where x represents the total number of students.

Cross multiply and you know have,

392∗100=28∗x392∗100=28∗x

Now divide 28 on both sides

(392∗100)/28=x(392∗100)/28=x

Do the arithmetic. The total number of students is 1400.

I hope it's helpful✌️❤️✌️

Answer 2

Answer:

80

Step-by-step explanation:

In an exam Number of students passed - 400"

Number of students failed - 20%

So, 400 / 20

=> 400 ÷ 20 is equals to 80