A jar contains 40 marbles, of which 18 are blue, 10 are red and the remainder are green. Find the ratio of the red marbles to all marbles and blue marbles to red marbles, green marbles to blue marbles and green marbles to red marbles to blue marbles
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Since 39 out of 40 marbles are green, the probability of randomly choosing green is 39/40.
However, the probability becomes 100% when you look into the bag and choose a green marble. (Unless you are blind or unable to distinguish blue from green, in which case the probability remains 39/40.)
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