Question

There are 6 blue marbles, 7 black marbles, 4 orange marbles, and 3 green marbles in a jar. Once a marble is drawn, it is replaced in the jar. What is the probability that you select a black marble and then a blue marble?

Answer 1

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there are 20 marbles in which 6 blue,7 black , 4 orange and 3 green marbles

the probability of getting a black marble and a blue marble is 13/20

hope it helps you