In a row Rina is 6th from left end Bhavya is 13th from right end. Bhavya is right to Rina . If there are 3 persons between them . Then how many persons are there in the row. 

22

Total number of persons in the row= Position of Rina from left + Position of Bhavya from right + persons in between Rina and Bhavya

                                                  = 6 + 13 + 3

                                                  = 22