In an exam of History and Computers, 33% and 40% students failed in History and Computers respectively. If 8% students failed both in History and Computers, find the percentage of students who passed in the exam.

In a collection of pink, red, and blue marbles, there are 25% more pink marbles than red marbles, and there are 50% more blue marbles than pink marbles. If A is the number of pink marbles, what is the total number of marbles?

A railway company makes a profit of BD 1695 on per ticket of business class while loses BD 191 on every ticket in economy class. If the company sold 3370 tickets of business class and 43110 tickets of economy class in the month of December, what would be the total profit or loss company will make in that month.