Ziyang Sim's answer to Jack Taylor's Junior College 1 H1 Maths Singapore question.
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(b) Choose One from each region
(c) Since you can only choose 2 region out of the 4, you'll only have 4 people remaining thus the 4C4
(c) Since you can only choose 2 region out of the 4, you'll only have 4 people remaining thus the 4C4
Date Posted:
4 years ago
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Having 4 people left for 4 slots/vacancies/positions means the selection is already done.