Question 1
In a class of 75 students, there are 37 boys and 38 girls. Raj ranks 13th from the top. There are 7 girls before him. How many boys are after his rank (towards the bottom)?
Students before him: 12. Of these, girls before = 7, so boys before = 12 - 7 = 5. Boys after = total boys - boys before - himself = 37 - 5 - 1 = 31.