Question

In an examination, 41% candidates failed in Music and 32% failed in mathematics. Also 13% failed in both the subjects. If the number of candidates who passed in Music alone is 399, then the total number of candidates is

Answer 1

Answer:

It is given that 310 candidates passed in both subjects. Let the total number of candidates appeared in the examination be x. Therefore, the total ...

Answer 2

Answer:

72% students passed in an exam. 392 students failed. What is the total number of students?

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,

[math]28/100 = 392/x[/math]

where x represents the total number of students.

Cross multiply and you know have,

[math]392 * 100 = 28 * x[/math]

Now divide 28 on both sides

[math](392 * 100)/28 = x[/math]

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