Guide :High School

There are 5 blue marbles and 4 red marbles in a bag. One marble is drawn from the bag and placed back into the bag. Then, a second marble is drawn. What is

There are 5 blue marbles and 4 red marbles in a bag. One marble is drawn from the bag and placed back into the bag. Then, a second marble is drawn. What is the probability that the two randomly select
There are 9 total marbles and 4 red marbles, since we replace after choosing the probability of choosing two reds in a row are:(4/9)^2=16/81  ( about 19.75%) ...

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