Question

in a row 'A' is in the 11th position from the left and 'B' is in the 10 th position from the right . if 'A' and 'B' interchange, then 'A' becomes 18th from the left. how many persons are there in the row other than 'A' and 'B'​

Answer 1

Answer:

There were 25 persons in the row other than 'A' and 'B' .

Step-by-step explanation:

Given as :

'A' is in 11th position from left end

'B' is in 10th position from right end

Let The total number of person in the row other than 'A' and 'B'  = n numbers

Again

If 'A' and 'B' interchange, then 'A' becomes 18th from the left.

it means 'B' was also at 18th position from left end .

So, we can say that there is 17 person to the left side of 'B' and 9 person are there to the right side of 'B'

i.e There were total number of 27 person in the row

So, The total number of person in the row other than 'A' and 'B' = total number of person in row - (sum of 'A' and 'B' )

i.e n = 27 - (2)

Or, n = 25

So, The total number of person in the row other than 'A' and 'B'  = n = 25 numbers

Hence, There were 25 persons in the row other than 'A' and 'B' . Answer