LTQ

In the black handbook, there are lowest points (COP) and highest points for each school. Though these highest points have no meaning for posting reference, I still wonder what exactly these highest points are.


If they are the highest T-score of a child in that school, then it’s quite difficult to explain why got 267 at Chestnut Drive SC last year based on merit over choice system. With 267 he/she could get in any school, why?

CoffeeCat:

LTQ:

This p6 maths question look simple but how can I get the right answer?


\"In an enrichment class of 48 students, each student must take at least a language class or a mathematics class. 7/12 of the students choose French language and 1/4 of the students choose French language and a mathematics class. How many students choose only a mathematics class?\"

Because the question ask \"choose only a mathematics class\", to me the answer can be from 0 to 8 students. But the answer from teacher is 20 students. Any wording trick in this question and why 20 students?

Thanks in advance.

Hmm actually there's something funny, The setter means language = french.
This is a \"standard\" question involving venn diagrams, so maybe you can draw it to visualise the below explanation...
The first sentence implies that any of the 48 students are either in a language (french) class ONLY, a maths class ONLY, or both classes.
(translates to : total no. of students = french only + both + math only
The venn diagram is 2 circle intersecting, 1 circle representing the total number of students in the french class and the other circle representing the total number in math class , and the intersecting region representing the number of students in both classes)

so 7/12 * 48 = 28 students are in the French class, 1/4*48 = 12 students are in both classes. Which means 28-12 = 16 students are not in maths class or in french class ONLY.

Hence the number of students in math class only is 48 - 16 -12 = 20.

Thank you very much for your explanation.

But like you said, only when language = french then this answer is correct. People can argue that what about those choose English, Chinese... because both \"a language class\" and \"French language\" are mentioned in the question.

If these kinds of unclear question appear in PSLE, wonder how the kids can solve them in a right way...

This p6 maths question look simple but how can I get the right answer?


"In an enrichment class of 48 students, each student must take at least a language class or a mathematics class. 7/12 of the students choose French language and 1/4 of the students choose French language and a mathematics class. How many students choose only a mathematics class?"

Because the question ask "choose only a mathematics class", to me the answer can be from 0 to 8 students. But the answer from teacher is 20 students. Any wording trick in this question and why 20 students?

Thanks in advance.