Half Yearly Exam Revision of Polynomials

In the half yearly exam only 70% if the students were passed. Out of these (passed in half yearly) only 60% student are passed in annual exam. Out of those who did not pass the half yearly exam, 80% passed in annual exam. What per cent of the students passed the annual exam ?

What is amount when compounded half-yearly

Question Stimulus Fill in the blank with the correct option. My friend has lent me ….. books and notes for my half yearly exams.