Question

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?​

Answer 1

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STATISTICS

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 body in the class is

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ANSWER

Let the number of boys and girls be x and y

According to the question,

⇒ 52x+42y=50(x+y)

⇒ 52x+42y=50x+50y

⇒ 52x−50x=50y−42y

⇒ 2x=8y

∴ x=4y ------ ( 1 )

Total number of students in the class =x+y

=4y+y [ From ( 1 ) ]

=5y

Percentage of boys =

5y/4y×100

=80%

I hope its'help you

Answer 2

Answer:

55.31%

hope it helps . thanku