As seen in the figure, Aamir Khan’s rank is 17^th from the bottom.
Hritik is 7^th ranks ahead of Aamir Khan’s ranks = 17 + 7 = 24.
Hritik Ranks from the bottom = 24^th

So, Hritik's rank from the top = (Total number of students - Hritik's rank from the bottom) + 1