Continuing with our series of videos covering all the questions from the 2018 Edexcel Higher Tier Maths Paper, Best Maths Tutors covers question 16. This question is about using ratios and probability, initially, you are given the ratio of one colour of counters to another and the probability of drawing a third counter. From this you have to work out the ratio of the three counters in the bag to each other to finally work out the probability that a different colour is chosen.
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