Arnold K H Tan's answer to Osman's Secondary 4 A Maths Singapore question.

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Arnold K H Tan
Arnold K H Tan's answer
2149 answers (A Helpful Person)
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Numbers were missing, so i added possible values.

Interesting read:
https://www.channelnewsasia.com/news/cnainsider/university-students-volunteer-tuition-covid-19-hbl-12642366