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Nancy earned $25, $60, and $42 for babysitting three times last week. She spent $48.95 of her babysitting earnings to buy a pair
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A tree diagram can be drawn for a clearer understanding. The branches of the tails can be ignored since we are not concerned about that. To find the probability along the branches, we just have to multiply the probabilities of each branch, giving you an answer of 1/128
