The total number of children in the class is 30.
What is an expression?
Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication and division.
Given that:-
- Two-thirds of the children in the fourth-grade class are girls. If there are 20 girls, what is the total number of children in the class?
The number of the total students is:-
Let the total number of the students be x in the class.
( 2 / 3 ) x = 20
x = 10 x 3
x = 30 students
Therefore the total number of children in the class is 30.
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