# Maths

In a class of boys and girls the mean weight of 8 boys is 55kg and the mean weight of a group of girls os 48kg the mean weight of all the children is 50.8kg how many girls are there

1. 👍 0
2. 👎 0
3. 👁 172
1. In a class of boys and girls the mean weight of 8 boys is 55kg and the mean weight of a group of girls os 48kg the mean weight of all the children is 50.8kg how many girls are there

1. 👍 0
2. 👎 0
2. Just add up all the weights
if there are g girls, then you know that
55*8 + 48g = 50.8(8+g)
Now just solve for g

1. 👍 0
2. 👎 0

## Similar Questions

1. ### algebra

A math class has 3 girls and 7 boys in the seventh grade and 2 girls and 2 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that

asked by Anneasha on June 16, 2018
2. ### maths

In a graduating class with the same number of boys and girls, 1/8 of the girls and 5/6 of the boys are honor students. What part of the class consists of boys who are not honor students

asked by athaulla on July 27, 2016
3. ### Mathematics

There are 5 more girls than boys in a class. If 2 boys join the class, the ratio of girls to boys will be 5:4. Find the number of girls in the class.

asked by Clinton on June 14, 2020
4. ### Math

A biology class has 12 boys and 18 girls .what fraction of the class are boys? Solution. 12/30=2/5 Please tell me this correct or not.

asked by ABC on May 24, 2017
5. ### Algebra

A math class has 7 girls and 5 boys in the seventh grade and 4 girls and 4 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that

asked by Anesha on February 22, 2016
1. ### math

8) A high school graduating class is made up of 445 students. There are 97 more girls than boys. How many boys are in the class? A) 445 boys B) 271 boys C) 97 boys D) 174 boys

asked by chchch on June 24, 2012
2. ### Math

Solve. There are 18 boys in a class. There are w fewer boys than girls. How many students are there in the class?

asked by Janey on April 17, 2013
3. ### Algebra

Ms. Chang has 24 students in her class, and 8 of them are boys. What is the ratio of boys to girls? A. 1:2 B. 1:3 C. 2:1 D. 2:3 I think the answer is D but i'n not sure.

asked by Anonymous on June 13, 2014

A class consist of half as many boys as girls, if there are 14 boys how many girls are there

asked by janet on November 17, 2011
5. ### Math

Mrs.Smith's class has 12 girls and 8 boys. What percent of he class are girls? [#boys/girls+boys]*100 = percent I didn't read the problem very carefully. The calculation above is percent boys. Percent girls is done similarly but

asked by hALIDA on May 3, 2007
6. ### Geometry

When Ms Shreve randomly selects a student in her class, she has 1/3 probability of selecting a boy. A: If her class has 36 students, how many boys are in her class? B: if there are 11 boys in her class, how many girls are in her

asked by Anonymous on September 18, 2017