Question

In a row of boys, A is thirteenth from the left, and D is seventeenth from the right. If in this row A is eleventh from the right, then what is the position of D from the left?

Answer 1

To find D's position from the left, add A's positions from both ends of the row and subtract one to get the total number of boys. Then subtract D's position from the right from the total and add one. D is seventh from the left.

Step-by-step explanation:

To solve the problem of determining the position of the boy D from the left in the row, we are given three key pieces of information:

• A is thirteenth from the left.
• D is seventeenth from the right.
• A is also eleventh from the right.

First, let's find out how many boys are in the row. The total number of boys can be calculated by adding A's positions from both ends of the row and then subtracting one to account for A being counted twice:

Total number of boys = (A's position from the left + A's position from the right) - 1

Total number of boys = (13 + 11) - 1 = 23

Now that we know there are 23 boys in the row, we can determine D's position from the left. Since D is seventeenth from the right, we subtract D's position from the total number of boys and add one to get his position from the left:

D's position from the left = (Total number of boys - D's position from the right) + 1

D's position from the left = (23 - 17) + 1 = 7

Therefore, D is seventh from the left.