Raman is 7 ranks ahead of Suman in a class of 39. If Suman's rank is seventeenth from the last, what is Raman's rank from the start?

Options

A. 14th
B. 15th
C. 16th
D. 17th

Explanation

To find Raman's rank from the start, we can follow these steps:

1. **Determine Suman's Rank from the Start**:
- Suman's rank is given as 17th from the last.
- In a class of 39 students, we can find Suman's rank from the start using the formula:
\[ \text{Rank from the start} = \text{Total students} - \text{Rank from the last} + 1 \]
- Substituting the values:
\[ \text{Suman's rank from the start} = 39 - 17 + 1 = 23 \]

2. **Calculate Raman's Rank from the Last**:
- We know that Raman is 7 ranks ahead of Suman.
- Therefore, Raman's rank from the last can be calculated as:
\[ \text{Raman's rank from the last} = \text{Suman's rank from the last} - 7 \]
- Since Suman's rank from the last is 17, we have:
\[ \text{Raman's rank from the last} = 17 - 7 = 10 \]

3. **Determine Raman's Rank from the Start**:
- Now we can find Raman's rank from the start using the same formula as before:
\[ \text{Raman's rank from the start} = \text{Total students} - \text{Raman's rank from the last} + 1 \]
- Substituting the values:
\[ \text{Raman's rank from the start} = 39 - 10 + 1 = 30 \]

So, Raman's rank from the start is **30th**.