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Stanley noticed that he is both the 10th tallest and the 10th shortest student in his class. If everyone in the class is at a different height, how many students are in the class?
A. 19
B. 20
C. 21
D. 22

Answer :

There are 19 students in the class

What is algebra?

The area of mathematics known as algebra deals with symbols and the formulas used to manipulate them. These symbols, which are currently expressed as Latin and Greek letters, are used in elementary algebra to represent variables or quantities without set values.

Given

If Stanley is the 10th tallest, then there are 9 shorter students

and if he is 10th shortest in the class, there are 9 taller students

9 + 1 + 9=19

so, there are 19 students in the class

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