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    NationalMediumStatistics7–9

    A bag holds 33 red, 55 blue and 44 green marbles. One marble is drawn at random. What is the probability that it is red?

    Um saco tem 33 berlindes vermelhos, 55 azuis e 44 verdes. Retira-se um berlinde ao acaso. Qual é a probabilidade de ser vermelho?

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    Solution

    Step 1 of 3

    1. 1.Laplace's rule: favourable cases over possible cases.