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Directions: Study the following information carefully and answer the questions given beside.
In a school, there are 4 classes (9th, 10th, 11th and 12th).
The ratio of the number of boys in the 10th class to that in the 12th class is 1 : 3. 
The ratio of the number of girls to the number of boys in the 9th class is 2 : 1.
In the 10th class, there are 80% girls.
The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.
The number of girls in the 10th class and the 12th class is 80% and 350% respectively of the number of girls in the 9th class.
The number of girls in the 9th class is 10% of the total number of students in the school.
Q. The number of students in the 12th class is what percentage of the total students in the school?
  • a)
    37
  • b)
    41
  • c)
    39
  • d)
    43
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Directions: Study the following information carefully and answer the q...
From common explanation, we have
The number of students in 12th class = 35x + 6x = 41x
So the answer = 41%
Hence, Option B is correct.
Common explanation:
Let the total students = 100x
The number of girls in the 9th class is 10% of the total number of students in the school.
Girls in the 9th class = 10% of 100x = 10x
                    
The number of girls in 10th class and in 12th class is 80% and 350% of the number of girls in 9th class.
Girls in 10th class = 80% of 10x = 8x
Girls in 12th class = 350% of 10x = 35x
The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.


In the 10th class, there are 80% girls.

The ratio of the number of girls to the number of boys in the 9th class is 2 : 1.

The ratio of the number of boys in the 10th class to that in the 12th class is 1 : 3.

Boys in 11th class = 22x – (2x + 5x + 6x) = 9x
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Community Answer
Directions: Study the following information carefully and answer the q...
Given Information:
- There are 4 classes in the school: 9th, 10th, 11th, and 12th.
- The ratio of boys in the 10th class to boys in the 12th class is 1:3.
- The ratio of girls to boys in the 9th class is 2:1.
- In the 10th class, 80% of the students are girls.
- The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.
- The number of girls in the 10th class and 12th class is 80% and 350% respectively of the number of girls in the 9th class.
- The number of girls in the 9th class is 10% of the total number of students in the school.

Calculation:
Let's assume the number of boys in the 10th class is 'x', and the number of boys in the 12th class is '3x'.

Ratio of Girls to Boys in the 9th Class:
The ratio of girls to boys in the 9th class is given as 2:1.

Let the number of girls in the 9th class be '2y' and the number of boys be 'y'.
Therefore, the total number of students in the 9th class would be '2y + y = 3y'.

Since the number of girls in the 9th class is 10% of the total number of students in the school, we can write:
2y = 0.1 * (3y + x + 3x) [Total number of students in the school = 3y + x + 3x]

Number of Girls in the 10th Class:
Given that 80% of the students in the 10th class are girls, we can write:
0.8 * (x + 2y) = 0.8 * (x + 2 * 0.1 * (3y + x + 3x))

Number of Girls in the 11th Class:
The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.
Therefore, 312.50% of (x + 2y) = 312.50% * (x + 2 * 0.1 * (3y + x + 3x)) = 312.50/100 * (x + 2 * 0.1 * (3y + x + 3x)) = 312.50/100 * (x + 0.6y + 0.6x + 1.8x) = 3.125 * (2.4x + 0.6y)

Number of Girls in the 10th and 12th Class:
The number of girls in the 10th class is 80% of the number of girls in the 9th class.
Therefore, 0.8 * (2y) = 0.8 * (2 * 0.1 * (3y + x + 3x)) = 0.16 * (3y
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Directions: Study the following information carefully and answer the questions given beside.In a school, there are 4 classes (9th, 10th, 11th and 12th).The ratio of the number of boys in the 10th class to that in the 12th class is 1 : 3.The ratio of the number of girls to the number of boys in the 9th class is 2 : 1.In the 10th class, there are 80% girls.The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.The number of girls in the 10th class and the 12th class is 80% and 350% respectively of the number of girls in the 9th class.The number of girls in the 9th class is 10% of the total number of students in the school.Q. The number of students in the 12th class is what percentage of the total students in the school?a)37b)41c)39d)43Correct answer is option 'B'. Can you explain this answer?
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Directions: Study the following information carefully and answer the questions given beside.In a school, there are 4 classes (9th, 10th, 11th and 12th).The ratio of the number of boys in the 10th class to that in the 12th class is 1 : 3.The ratio of the number of girls to the number of boys in the 9th class is 2 : 1.In the 10th class, there are 80% girls.The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.The number of girls in the 10th class and the 12th class is 80% and 350% respectively of the number of girls in the 9th class.The number of girls in the 9th class is 10% of the total number of students in the school.Q. The number of students in the 12th class is what percentage of the total students in the school?a)37b)41c)39d)43Correct answer is option 'B'. Can you explain this answer? for CLAT 2024 is part of CLAT preparation. The Question and answers have been prepared according to the CLAT exam syllabus. Information about Directions: Study the following information carefully and answer the questions given beside.In a school, there are 4 classes (9th, 10th, 11th and 12th).The ratio of the number of boys in the 10th class to that in the 12th class is 1 : 3.The ratio of the number of girls to the number of boys in the 9th class is 2 : 1.In the 10th class, there are 80% girls.The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.The number of girls in the 10th class and the 12th class is 80% and 350% respectively of the number of girls in the 9th class.The number of girls in the 9th class is 10% of the total number of students in the school.Q. The number of students in the 12th class is what percentage of the total students in the school?a)37b)41c)39d)43Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for CLAT 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: Study the following information carefully and answer the questions given beside.In a school, there are 4 classes (9th, 10th, 11th and 12th).The ratio of the number of boys in the 10th class to that in the 12th class is 1 : 3.The ratio of the number of girls to the number of boys in the 9th class is 2 : 1.In the 10th class, there are 80% girls.The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.The number of girls in the 10th class and the 12th class is 80% and 350% respectively of the number of girls in the 9th class.The number of girls in the 9th class is 10% of the total number of students in the school.Q. The number of students in the 12th class is what percentage of the total students in the school?a)37b)41c)39d)43Correct answer is option 'B'. Can you explain this answer?.
Solutions for Directions: Study the following information carefully and answer the questions given beside.In a school, there are 4 classes (9th, 10th, 11th and 12th).The ratio of the number of boys in the 10th class to that in the 12th class is 1 : 3.The ratio of the number of girls to the number of boys in the 9th class is 2 : 1.In the 10th class, there are 80% girls.The number of girls in the 11th class is 312.50% of the number of girls in the 10th class.The number of girls in the 10th class and the 12th class is 80% and 350% respectively of the number of girls in the 9th class.The number of girls in the 9th class is 10% of the total number of students in the school.Q. The number of students in the 12th class is what percentage of the total students in the school?a)37b)41c)39d)43Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for CLAT. Download more important topics, notes, lectures and mock test series for CLAT Exam by signing up for free.
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