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Mastering the Math IA Structure
Discover the 5 components every level 7 Internal Assessment must have to score full marks in Criterion A and B.
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This Week's Challenge
📝 Question of the Week
A bag contains \( 5 \) red marbles and \( 3 \) blue marbles. Two marbles are selected at random from the bag, one after the other, without replacement.
(a) Complete the tree diagram below to show all possible outcomes and their probabilities for the two selections.
[3 marks](b) Find the probability that both marbles selected are the same colour.
[3 marks](c) Given that the second marble selected is red, find the probability that the first marble selected was also red.
[3 marks]Total: [9 marks]
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