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There is a bag filled with 3 blue and 4 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 blues?

There Is A Bag Filled With 3 Blue And 4 Red Marbles A Marble Is Taken At Random From The Bag The Colour Is Noted And Then It Is Replaced Another Marble Is Taken class=

Sagot :

3 of 7 and the chances of getting red is 4 of 7

Step-by-step explanation:

Answer:  9/49

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Explanation:

The fraction 3/7 represents the probability of picking a blue marble since there are 3 blues out of 3+4 = 7 total.

Because the first marble is put back, this means the probability of picking blue does not change. So 3/7 is the probability of picking another blue marble.

Overall, we have (3/7)*(3/7) = 9/49 as the probability of picking two blues in a row.

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