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The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is
  • a)
    1 : 2
  • b)
    2 : 3
  • c)
    3 : 4
  • d)
    3 : 5
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The average age of students of a class is 15.8 years. The average age ...
Boys to girls ratio = 0.4 : 0.6 or 2 : 3
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The average age of students of a class is 15.8 years. The average age ...
Calculation:
- Let the number of boys in the class be B and the number of girls be G.
- The total number of students in the class is B + G.
- The total age of all students is (B * 16.4) + (G * 15.4) = 15.8 * (B + G).

Equation:
- 16.4B + 15.4G = 15.8(B + G)
- 16.4B + 15.4G = 15.8B + 15.8G
- 0.6B = 0.4G
- B/G = 2/3

Ratio:
- The ratio of the number of boys to the number of girls in the class is 2:3.
- Therefore, the correct answer is option B) 2:3.
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The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class isa)1 : 2b)2 : 3c)3 : 4d)3 : 5Correct answer is option 'B'. Can you explain this answer?
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The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class isa)1 : 2b)2 : 3c)3 : 4d)3 : 5Correct answer is option 'B'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class isa)1 : 2b)2 : 3c)3 : 4d)3 : 5Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class isa)1 : 2b)2 : 3c)3 : 4d)3 : 5Correct answer is option 'B'. Can you explain this answer?.
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