Question

In a line the posotion of A from left is 21st and of the B 7th from right if the position of both is changed then the position Of A from left becomes 25th tell how many boys are there in that line​

Answer 1

In a row of boys A is 13th from the left. Boys before A=12 boys

D is seventeenth from the right.Boys after D=16 boys

In the same row A is eleventh from the right=10 boys after him.

Therefore, total number of boys in the line=12+1+10=23 boys

Thus number of boys ahead of A=23-16-1=6

D's rank will be 6+1=7th rank