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MA (Contemporary China) | Mandarin Teacher | Chinese-English Translator | Economist By Training | E-Business Entrepreneur [MSc (e-Biz)]

๐“ ๐“‘๐“ฎ๐“ช๐“พ๐“ฝ๐“ฒ๐“ฏ๐“พ๐“ต ๐“œ๐“ฒ๐“ท๐“ญ If you were on Chinese social media during the past few days, you surely would not miss the viral topic of a ไธญไธ“ student, Jiang Ping ๅงœ่๏ผŒranked 12th in the qualifying round of 2024 Alibaba Global Mathematics Competition, alongside students from top institutions such as MIT, Cambridge. Tsinghua, and Peking universities. What is ไธญไธ“? It means vocational high school and Jiang is only 17 years old and a fashion major trainee at a vocational high school in Jiangsu Province. I took a look at the result of those qualified for the final competition (see comments) and was glad to find two Singaporeans, Dylan Toh (ranked 2nd) and Jeck Lim (ranked 7th), up there but they are PhD students and had participated in International Mathematical Olympiad before, and so they are trained and experienced in such competition. Thus Jiang's achievement is marvellous as it takes a lot of sacrifices to train for such competitions given that everyone is a Maths whiz kid, but Jiang has to do it by herself given that she is not majoring in Maths. Actually some of you might be aware of Gaokao ้ซ˜่€ƒ i.e. "The Nationwide Unified Examination for Admissions to General Universities and Colleges" , but do you know that there is a Zhongkao ไธญ่€ƒ i.e. "Junior High School Scholastic Aptitude Examination" which is like a streaming as those with good grades (about half of the cohort) would attend high school to sit for Gaokao eventually, whilst the rest would attend vocational school or become school dropout. Thus Jiang's success stirs up the country as it means that even if you are a ไธญไธ“ student, you could compete with the best minds in the world. I hope her accomplishment helps to send out a message to the parents that scholastic success is not the "be-all and end-all" for a student, and if one does not succeed in the examinations, it does not mean he/she is hopeless but it is because his/her talent and hard work have not being recognised yet, and eventually one would shine in life. Hopefully this would help to mitigate ๅ†…ๅท (the phenomenon where individuals or groups in a competitive environment push themselves to extreme levels) in the society. As an aside, below is a question from the qualifying round of 2022 Alibaba Global Mathematics Competition. This is a practical problem and it epitomises how Maths is useful in daily situations. In a summary, the problem is to calculate the probability (expected value) on how many cartons do you need to buy to collect ่™Ž่™Ž็”Ÿๅจ before you stop where you choose the cartons randomly. It is definitely very daunting for lay people like us to even understand the answer (provided in the comments) but I hope such question/answer would help to open your mind and heart that Maths is beautiful. ๐Ÿ”—#david_tbk_china โžฝ #China posts #Maths #Chinesesociety #Chineseeduction #Chineseculture

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David BK Tan

MA (Contemporary China) | Mandarin Teacher | Chinese-English Translator | Economist By Training | E-Business Entrepreneur [MSc (e-Biz)]

3w

๐“๐“ท๐“ผ๐”€๐“ฎ๐“ป is B i.e. one is expected to purchase at least 8 cartons to collect ่™Ž่™Ž็”Ÿๅจ. Actually when I came across Poisson process in the answer, I thought it sounded familiar as I had encountered Poisson distribution during A levels but after doing some research , they are different. Based on my understanding, Poisson process is about randomness of events happening independently of one another (like the problem in the post) but Poisson distribution is model that has made assumption that the events occur with a known constant mean rate and independently of the time since the last event.  Hence to solve this problem, one has to start with First Principles i.e. to identify the general formula that could solve any no. of parameter (่™Ž๏ผŒ็”Ÿ๏ผŒๅจ in this case). Because Poisson process has been identified, so the next step is to identify the general formula for the expected value in this problem and use Poisson distributiion to solve it. Note that (n) is the no. of discrete parameters and hence there are only three (่™Ž๏ผŒ็”Ÿ๏ผŒๅจ) but ่™Ž repeats once thus the objects are (2,1,1).

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David BK Tan

MA (Contemporary China) | Mandarin Teacher | Chinese-English Translator | Economist By Training | E-Business Entrepreneur [MSc (e-Biz)]

3w

Results of the qualifying round of 2024 Alibaba Global Mathematics Competition.

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