In a row of girls, Kamla is 10th from the left and Veena is 19th from the…
2023
In a row of girls, Kamla is 10th from the left and Veena is 19th from the right. If they interchange their positions, Kamla becomes 28th from the left. How many girls are there in the row ?
- A.
44
- B.
45
- C.
46
- D.
47
Attempted by 1 students.
Show answer & explanation
Correct answer: C
To find the total number of girls in the row, we need to understand how the positions change after the interchange.
Step-by-Step Analysis
Understand the positions:
Initially: Kamla is 10th from the left, Veena is 19th from the right.
After interchanging positions: Kamla becomes 28th from the left.
Analyze the swap:
When Kamla and Veena swap positions, Kamla moves to the spot that was originally occupied by Veena.
Therefore, Kamla's new position from the left (28th) is the same position that Veena originally occupied from the right (19th).
Calculate the total:
To find the total number of people in a row when you know the position of one person from both the left and the right, use the formula:
Total = (Position from left) + (Position from right) - 1
Total = 28 (Kamla's new left position) + 19 (Veena's original right position) - 1
Total = 47 - 1 = 46.