Question 1
In a class of 68 students, there are 38 boys and 30 girls. Raj ranks 11th from the top. There are 10 girls before him. How many boys are after his rank (towards the bottom)?
Students before him: 10. Of these, girls before = 10, so boys before = 10 - 10 = 0. Boys after = total boys - boys before - himself = 38 - 0 - 1 = 37.