SOLUTION: Professor Tsing meets five classes each day. One has 26 students, another has 33, and a fourth has 28 students. If this represents 78% of the students in her classes, what is the t

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First we add all known classes:

This 87 represents 78% of all students
We want to find x that represents 100% of all students
We can write this relationship as:

We convert percentages to decimal values:


Number of total students = 112