Vijay ranked 10th in a class of students. In that class Damini is 27th from the bottom. If there are 18 students between Vijay and Damini, then what is the total number of students in the class?

55

Total number of students =position from left + position from right + no of person sitting between left and right

Required number of students = 10 + 27 + 18 = 55