In a class, 70 students wrote two tests wiz, test-I and test-II `50%` of the students failed in test I and `40%` of the students in test -II. How many students passed in both tests?

In class , 70 students wrote two tests, viz,. Test-I and Test-II. 50% of the students failed in Test-I and 40% of the students failed in Test-II. How many students passed in both the tests?

In a test. 90% of the students passed and 4 students failed. How many students appeared for the test?

Marks of students in a test is

In a class, 80% of students pass in maths exam and 70% of students pass in English exam. 10% of students fail in Both subjects and if 144 students pass in Both subejects. Find the total number of students.