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Is there any other easier method of solving problems like this?
Because the tree diagram method confuses me :(
Question: A hat contains 4 marbles one orange one yellow one green and one blue. Two marbles are selected at random from the hat.
A) determine the number of sample points in the sample space
B) list the sample space
C) determine the probability of selecting exactly 1 blue marble
D) determine the probability of selecting no orange marbles
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