In a row of girls, Kashish in fifth from the left and Mona is sixth, from the right. When they interchange their place among themselves, Kashish becomes thirteenth from the left. Then what will be Mona's position from the right?

Options

A. 4th
B. 8th
C. 14th
D. 15th

Explanation

To solve the problem step by step, let's break it down:

### Step 1: Understand the initial positions
- Kashish is 5th from the left.
- Mona is 6th from the right.

### Step 2: Determine Kashish's new position after the interchange
After they interchange their positions, Kashish becomes 13th from the left.

### Step 3: Calculate the total number of girls in the row
To find the total number of girls, we can use the formula:
\[ \text{Total number of girls} = \text{Position from the left} + \text{Position from the right} - 1 \]
Here, we know Kashish's new position from the left (13) and Mona's position from the right (6).

Substituting the values:
\[ \text{Total number of girls} = 13 + 6 - 1 = 18 \]

### Step 4: Find Mona's position from the left
Since Kashish was originally 5th from the left, and after the interchange, he is now in Mona's position, we need to determine Mona's position from the left:
- The total number of girls is 18.
- Kashish's original position from the left is 5.

Using the total number of girls, we can find Mona's position from the left:
\[ \text{Position from the left} = \text{Total number of girls} - \text{Position of Kashish from the left} + 1 \]
\[ \text{Position from the left} = 18 - 5 + 1 = 14 \]

### Step 5: Calculate Mona's position from the right
Now, we can find Mona's position from the right using the total number of girls:
\[ \text{Position from the right} = \text{Total number of girls} - \text{Position from the left} + 1 \]
Substituting the values:
\[ \text{Position from the right} = 18 - 14 + 1 = 5 \]

### Conclusion
Mona's position from the right is 14th.