Nitin is 15th from left end and Shalu is 7th from right end . If there are total 30 students in row . Find how many students are between Nitin and Shalu.

8

Total number of students in a row = rank of Nitin from left end + Rank of Shalu from right end + number of students between Nitin and Shalu

 30= 15 + 7 + number of students between Nitin and Shalu

number of students between  Nitin and Shalu = 30 - 22 = 8