Math Is Fun Forum

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Ratio of Students

In a class, the mean of boys' mark is 7.1 while the mean of girls' mark is 8.1. Their overall mean is 7.5. If there are 40 students in the class, determine:
a. The ratio of boys and girls
b. The number of boys and girls

I got this question from someone I tutored. I got the number of boys as 24 and the number of girls as 16. However, his teacher got vice-versa. Which one was right?

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Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.

thickhead

Member

Registered: 2016-04-16

Posts: 1,086

Re: Ratio of Students

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{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Re: Ratio of Students

Glad I was the one who's right.

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Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.