Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 9 - No. 11)

In an algorithm designed to find the average of a set of marks, which of the following steps is essential?

Sorting the marks in ascending order.

Calculating the total of the marks.

Searching for the lowest mark.

Counting the number of students.

Finding the average requires both the total sum of the marks and the number of marks.