Question

In a row of crows, A is 10th from the left and B is 9th from the right. A is 15th from the left when they interchange their positions. How many crows are there in the row?

• A. 31
• B. 19
• C. 23
• D. 28

Answer 1

Answer:

C. 23

Solution:

Given:

A from the left = 10th

B from the right = 9th

After interchange the positions,

A from the left = 15th from left = B's position from left.

Total crows = ?

Formula:

Total = L + R - 1

Calculation:

Total Crows = (B's position from left + B's position  from the right) = 15 + 9 - 1 

⇒ Total Crows = 23

Hence, the correct answer is "23".