don steward
mathematics teaching 10 ~ 16

Sunday, 10 April 2016

generalising GCSE questions (13)

in this AQA question, students are asked to show that a combined probability and a single probability are equal, where there are the same ratios of coloured balls for a particular case

which prompts the question: is this always true?

considering a general case
some reasonably complex algebra to show that the combined probability of getting a blue is 1/3

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