Question

In a row of students, Rina is 12th from the left and 9th from the right. How many students are there in the row?

• A. 20
• B. 21
• C. 19
• D. 22

Hint:

To find total number of students from positions at both ends, add both positions and subtract 1.

Answer 1

The Correct Option is A

Step 1: Rina is 12th from the left.
Step 2: Rina is 9th from the right.
Step 3: To find the total number of students when a person's left and right positions are known, apply the formula:
\[\text{Total students} = \text{Position from left} + \text{Position from right} - 1\]Step 4: Input the given values:
\[= 12 + 9 - 1 = 20\]Step 5: The total number of students in the row is 20.