The average marks of boys in a class is 52 and that of girls is 42 . The average marks of boys and girls combined is 50 . The percentage of boys in th - Mathematics MCQ AIEEE 2007 2026 | ExamTest.live

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The average marks of boys in a class is 52 and that of girls is 42 . The average marks of boys and girls combined is 50 . The percentage of boys in the class is:

Solution & Step-by-step Explanation

Let the number of boys be B and the number of girls be G .Total marks of boys = 52 B .Total marks of girls = 42 G .Total marks of the class = 50 (B + G) . 52 B + 42 G = 50 B + 50 G 52 B - 50 B = 50 G - 42 G 2 B = 8 G ⟹ B = 4 G Percentage of boys = \frac{B}{B + G} \times 100 $ = \frac{4 G}{4 G + G} \times 100 = \frac{4 G}{5 G} \times 100 = 80% $

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The average marks of boys in a class is 52 and that of girls is 42 . The average marks of boys and girls combined is 50 . The percentage of boys in the class is:

40

20

80

60

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