Ritu and Monika are ranked 8th and 9th respectively from top in a class of 27. What are their respective ranks from the last.

 20th & 19th

Total number of students = Rank from top + Rank from bottom - 1 

Ritu rank from last, 

Total number of students = Rank from top + Rank from bottom - 1 

rank from last = 27 + 1 - 8 = 20

Monika rank from last, 

Total number of students = Rank from top + Rank from bottom - 1 

rank from last = 27 + 1 - 9 = 19

 Ans. 20th & 19th