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This problem offers an engaging context in which to develop students' understanding of theoretical probability. They can calculate theoretical probabilities, perhaps by listing at first, but then by moving towards multiplying fractions based on conditional probabilities.
You could introduce the problem by simulating a lottery using numbered balls or digit cards in a bag.
How often would you expect to win?
Why is the probability of winning the two from six lottery the same as the probability of winning the four from six lottery?
You may want to experiment with this lottery simulator before moving on to the theoretical probabilities