In an examination, 25% students failed in mathematics 20%

In an examination, 25% students failed in mathematics 20% students failed in Mathematics, 20% failed in Economics and 5% failed in both. Find the percentage of students who passed in both the subjects.

Here, x = 25, y = 20 and z = 5
According to the formula,
Required percentage = [100 - (25 + 20 - 5)]%
= [100 - (45 - 5)]% = (100 - 40)% = 60%