How many students total are in this class?

AI Thread Summary
The discussion revolves around a discrepancy in calculating the total number of students in a class, with the book stating there are 28 students. One participant mistakenly added shoe sizes instead of the frequencies of those sizes, leading to a larger total. Others pointed out the error and humorously questioned the practicality of a size 2 shoe in a third-year math class. The conversation highlights the importance of correctly interpreting the problem and assumptions about shoe sizes. Ultimately, the consensus is that the book's answer of 28 students is correct.
Phisico
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Homework Statement
I got the different answer as in the book, explain please if I am wrong.
Relevant Equations
Total number of students?
242831
The book got 28 students, I got up, when I added up 2+3+4 etc. I got a bigger answer explain please, if I did it wrong.
Thank - you
in advance
 
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Phisico said:
Problem Statement: I got the different answer as in the book, explain please if I am wrong.
Relevant Equations: Total number of students?

View attachment 242831 The book got 28 students, I got up, when I added up 2+3+4 etc. I got a bigger answer explain please, if I did it wrong.
Thank - you
in advance
What did you get for the number of students? This is a very simple problem that requires only that you keep a running total of the frequencies of the shoe sizes. BTW, I agree with the book's answer.
 
Thanks/ I understood it.
 
Phisico said:
Problem Statement: I got the different answer as in the book, explain please if I am wrong.
Relevant Equations: Total number of students?

I got up, when I added up 2+3+4 etc.
It looks like you were adding the shoe sizes instead of the frequencies.
 
Who in the world wears a size 2 shoe? :smile:
 
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berkeman said:
Who in the world wears a size 2 shoe? :smile:
Must have had Hervé Villechaize in the class
 
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berkeman said:
Who in the world wears a size 2 shoe? :smile:
Looks like the problem designer failed to take heed of the fact (among others he apparently disregarded) that the specification "third year maths class" should bias the distribution (of students over/across shoe sizes) to the right. 😉
 
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Some assumptions happening here: who says they have the same size on each foot?
There are at least 14 students in the class.
:-p
 
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DaveC426913 said:
Some assumptions happening here: who says they have the same size on each foot?
There are at least 14 students in the class.
:-p
HEY, *I'M* supposed to be the nitpicker in chief on this forum :smile:
 
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  • #10
berkeman said:
Who in the world wears a size 2 shoe? :smile:
Perhaps they wear size 4, but have only one shoe.
 

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