Nimish is 12th  from left end and Simran is 7th from right end . If there are total 30 students in row . Find how many students are between Nimish and Simran.

11

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

 30 = 12 + 7 + number of students between Nimish and Simran

number of students between  Nimish and Simran = 30 - 19 = 11