Question

В классе 38 человек ,причем мальчиков на 4 меньше , чем девочек .Какую часть класса состовляют девочки

Answer 1

Х - кол-во мальчиков, тогда х+х+4=38         2х=34      х=17 - мальчиков      17+4=21 - девочек

Answer 2

Пусть девочки х ,тогда мальчики х-4
х+х-4=38
2х=42
х=21 -кол во девочек
21/38 часть составляют девочки 

Answer 3

Calculating the Fraction of Girls in the Class

To calculate the fraction of girls in the class, we can use the information provided: there are 38 students in total, with the number of boys being 4 less than the number of girls.

Given: - Total students = 38 - Boys = Girls - 4

Let's calculate the number of girls and boys in the class.

Calculation

- Let's assume the number of boys as b and the number of girls as g. - We know that b + g = 38 and b = g - 4.

Solving these equations: - g - 4 + g = 38 - 2g - 4 = 38 - 2g = 42 - g = 21

So, there are 21 girls in the class.

Answer

The fraction of girls in the class is 21/38, which is approximately 55.26%.