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In a class, the number of girls is 20% more than that of the boys. The strength of the class is 66. If 4 more girls are admitted to the class, the ratio of the number of boys to that of the girls is. 
  • a)
    1: 2 
  • b)
    3 : 4 
  • c)
    1: 4 
  • d)
    3: 5 
Correct answer is option 'B'. Can you explain this answer?
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In a class, the number of girls is 20% more than that of the boys. The...
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In a class, the number of girls is 20% more than that of the boys. The...
Given:
- The number of girls in the class is 20% more than the number of boys.
- The total strength of the class is 66.

To find:
- The ratio of the number of boys to the number of girls after 4 more girls are admitted to the class.

Solution:

Let's assume the number of boys in the class as 'x'.
According to the given information, the number of girls will be 20% more than 'x'.

Therefore, the number of girls = x + 20% of x = x + 0.2x = 1.2x.

It is also given that the total strength of the class is 66.
So, the sum of the number of boys and girls is equal to 66.

x + 1.2x = 66
2.2x = 66
x = 66/2.2
x = 30

Therefore, the number of boys in the class is 30.

Now, let's find the number of girls:
Number of girls = 1.2x = 1.2 * 30 = 36.

The ratio of the number of boys to the number of girls is:
30 : 36 = 5 : 6.

Now, 4 more girls are admitted to the class.
So, the new number of girls = 36 + 4 = 40.

The new ratio of the number of boys to the number of girls is:
30 : 40 = 3 : 4.

Hence, the correct answer is option 'B' which is 3 : 4.
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In a class, the number of girls is 20% more than that of the boys. The strength of the class is 66. If 4 more girls are admitted to the class, the ratio of the number of boys to that of the girls is.a)1: 2b)3 : 4c)1: 4d)3: 5Correct answer is option 'B'. Can you explain this answer?
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In a class, the number of girls is 20% more than that of the boys. The strength of the class is 66. If 4 more girls are admitted to the class, the ratio of the number of boys to that of the girls is.a)1: 2b)3 : 4c)1: 4d)3: 5Correct answer is option 'B'. Can you explain this answer? for Teaching 2024 is part of Teaching preparation. The Question and answers have been prepared according to the Teaching exam syllabus. Information about In a class, the number of girls is 20% more than that of the boys. The strength of the class is 66. If 4 more girls are admitted to the class, the ratio of the number of boys to that of the girls is.a)1: 2b)3 : 4c)1: 4d)3: 5Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Teaching 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a class, the number of girls is 20% more than that of the boys. The strength of the class is 66. If 4 more girls are admitted to the class, the ratio of the number of boys to that of the girls is.a)1: 2b)3 : 4c)1: 4d)3: 5Correct answer is option 'B'. Can you explain this answer?.
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