In a row Riya is 15th from left end Mehak is 18th from right end. Mehak is right to Riya. If there are 7 persons between them . Find rank of Riya from right end .

26

Total number of persons in the row= Position of Riya from left + Position of Mehak from right + persons in between Riya and Mehak

 = 15 + 18 + 7 

= 40 

Total number of persons in the row= Rank from Right + Rank from Left - 1

Position from right end = total number of person + 1 - position from left end 

Riya position from right end = 41 - 15 = 26