Question

Three classes of school children are selling tickets to the school play. The number of tickets sold by these classes, and the number of children in each of the classes have been read into these variables: tickets, tickets, tickets 3 and class1, class2, class3. Write an expression for the average number of tickets sold per school child.

Answer 1

We know that by employing the formula for the average here, we can find the average number of tickets sold per school child as the ratio of the total number of tickets sold to the total number of children in the school.

Let A be the average number of tickets sold per school child.

Let T be the total number of tickets sold.

Let C be the total number of children in the school.

Then from the information provided in the question,

T=tickets1+tickets2+tickets3 and C=class1+class2+class3

Thus, A can be expressed as:

A = tickets1+tickets2+tickets3/class1+class2+class3

Answer 2

The expression for the average number of tickets sold per school child is:

`M = (tickets*class1 + tickets2*class2 + tickets3*class3)/(class1 + class2 + class3)`

Explanation:

The average number of tickets sold per school child is the weighted mean calculus between the number of tickets sold by these classes and the number of children in each classes.

This is the multiplication between the number of tickets sold by these classes and the number of children in each classes divided by the total weight(in this exercise, the total weight is the total number of school child).

So, the expression for the average number of tickets sold per school child is:

`M = (tickets*class1 + tickets2*class2 + tickets3*class3)/(class1 + class2 + class3)`