Henry Tan's answer to Gareth Lui's Primary 6 Maths Data Analysis Singapore question.

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Henry Tan
Henry Tan's answer
359 answers (A Helpful Person)
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Assumption method. Another method is guess and check method. Assumption method is the fastest way to get the answer. There are steps by steps video presentation from https://youtu.be/Lr2g15hki9E that you can learn how to solve the above question.