question_answer

In a row of girls Alka and Kamini occupy the ninth place from the right end and tenth place from the left end, respectively. If they interchange their places, Alka and Kamini occupy seventeenth place from the right and eighteenth place from the left, respectively. How many girls are there in the row?

A)  25                   

B)  26           

C)  27                   

D)  Data inadequate