AP EAMCET · Maths · Statistics
The average marks of boys in a class is 40 and that of girls is 45 . The average marks of both boys and girls combined is 42 . Then the percentage of boys in the class is
- A \(60 \%\)
- B \(30 \%\)
- C \(40 \%\)
- D \(50 \%\)
Answer & Solution
Correct Answer
(A) \(60 \%\)
Step-by-step Solution
Detailed explanation
Let the number of boys and girls in the class are \(m\) and \(n\) respectively, so according to given informations, Total marks of boys \(=40 \mathrm{~m}\) and total marks of girls \(=45 n\) and total marks of boys and girls \(=42(m+n)\)…
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