In a line of kids, R stands 10th from the left end while S stands 12th from the right end. Upon swapping their places with each other, R's position updates to 14th from the left end. What is the total count of kids standing in the line?

Correct Answer: Option 25

Step-by-Step Explanation:

Step 1: Understand the initial positions.
Initially, R is 10th from the left end of the line.
S is 12th from the right end of the line.

Step 2: Analyze the position after swapping.
When R and S swap their places, R moves to the position previously occupied by S.
After the swap, R's new position is given as 14th from the left end.
Since R is now in S's original position, this means S's original position is 14th from the left end.

Step 3: Calculate the total number of kids in the line.
Now we know both positions of S's original location:
- From the left end, it is 14th.
- From the right end, it is 12th.

To find the total count of kids in the line, we add its position from the left and its position from the right, and then subtract 1 (because that spot is counted twice):

$\text{Total kids}=\left(\text{Position from left}\right)+\left(\text{Position from right}\right)-1$

$\text{Total kids}=14+12-1$

$\text{Total kids}=26-1=25$

Therefore, the total count of kids standing in the line is 25.