Veronica  is 11th  from left end and Reema is 9th from right end . If there are total 40 students in row . Find how many students are between Veronica  and Reema .

20

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

40 = 11 + 9 + number of students between Veronica and reema

number of students between  Veronica  and reema = 40 - 20 = 20