In a row of boys, Amar is 7th from the left and Vivek is 12th from the right. If they interchange their positions, Amar becomes 22nd from the left. How many boys are there in the row?
1
19
2
31
3
33
4
34
In a row of boys, Amar is 7th from the left and Vivek is 12th from the right. If they interchange their positions, Amar becomes 22nd from the left. How many boys are there in the row?