Question

There is a bag filled with 4 blue and 5 red marbles.
A marble is taken at random from the bag, the colour is noted and then it is not replaced.
Another marble is taken at random.
What is the probability of getting 2 of the same colour?

Answer 1

Answer:

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Step-by-step explanation:

There is a bag filled with 4 blue and 5 red marbles. A marble is taken at random from the bag, the colour is noted and then it is replaced. Another marble is taken at random. What is the probability of getting 2 reds?

Kenneth Chen

Answered 2 years ago

There are 9 total marbles, meaning the probability of getting a red the first time is 59 .

The second time, there are only 4 red marbles and 8 total marbles, so the chance of getting a red on the second time is 12 .

The probability of getting 2 reds is 59⋅12=518 .

Hope this helped