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In a row of student Ravi is 7th from one extreme and 11th from the other. Find the total number of students in the row.
- a)17
- b)18
- c)19
- d)20
Correct answer is option 'A'. Can you explain this answer?
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In a row of student Ravi is 7th from one extreme and 11th from the oth...
Given:
Ravi is 7th from one extreme (let's call it extreme A) and 11th from the other extreme (let's call it extreme B).
To find:
The total number of students in the row.
Solution:
Let's assume the total number of students in the row is 'x'.
Key Point:
The sum of the position of a person from one extreme and the position of the same person from the other extreme is always equal to the total number of persons in the row plus 1.
Using the key point:
From the given information, we can write two equations:
- Ravi is 7th from extreme A: (Position of Ravi from extreme A) + (Position of Ravi from extreme B) = x + 1
- Ravi is 11th from extreme B: (Position of Ravi from extreme B) + (Position of Ravi from extreme A) = x + 1
Substituting the given positions:
- Ravi is 7th from extreme A: 7 + (Position of Ravi from extreme B) = x + 1
- Ravi is 11th from extreme B: (Position of Ravi from extreme B) + 11 = x + 1
Combining the equations:
7 + (Position of Ravi from extreme B) = (Position of Ravi from extreme B) + 11
7 = 11
Contradiction:
The above equation is contradictory. Therefore, there is no solution for this equation.
Conclusion:
The total number of students in the row cannot be determined based on the given information.
Ravi is 7th from one extreme (let's call it extreme A) and 11th from the other extreme (let's call it extreme B).
To find:
The total number of students in the row.
Solution:
Let's assume the total number of students in the row is 'x'.
Key Point:
The sum of the position of a person from one extreme and the position of the same person from the other extreme is always equal to the total number of persons in the row plus 1.
Using the key point:
From the given information, we can write two equations:
- Ravi is 7th from extreme A: (Position of Ravi from extreme A) + (Position of Ravi from extreme B) = x + 1
- Ravi is 11th from extreme B: (Position of Ravi from extreme B) + (Position of Ravi from extreme A) = x + 1
Substituting the given positions:
- Ravi is 7th from extreme A: 7 + (Position of Ravi from extreme B) = x + 1
- Ravi is 11th from extreme B: (Position of Ravi from extreme B) + 11 = x + 1
Combining the equations:
7 + (Position of Ravi from extreme B) = (Position of Ravi from extreme B) + 11
7 = 11
Contradiction:
The above equation is contradictory. Therefore, there is no solution for this equation.
Conclusion:
The total number of students in the row cannot be determined based on the given information.
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In a row of student Ravi is 7th from one extreme and 11th from the other. Find the total number of students in the row.a)17b)18c)19d)20Correct answer is option 'A'. Can you explain this answer?
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In a row of student Ravi is 7th from one extreme and 11th from the other. Find the total number of students in the row.a)17b)18c)19d)20Correct answer is option 'A'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about In a row of student Ravi is 7th from one extreme and 11th from the other. Find the total number of students in the row.a)17b)18c)19d)20Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a row of student Ravi is 7th from one extreme and 11th from the other. Find the total number of students in the row.a)17b)18c)19d)20Correct answer is option 'A'. Can you explain this answer?.
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