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There is a bag filled with 3 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 reds?

Respuesta :

mhanifa

Answer:

  • 5/14

Step-by-step explanation:

There are 5 red marbles out of 8.

The probability of the first red:

  • P(r1) = 5/8

Now we have 7 total marbles and 4 of them are red.

The probability of the second red:

  • P(r2) = 4/7

The probability of two red is:

  • P(rr) = 5/8*4/7 = 5/14

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