Question

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A bag contains 6 blue coins and 4 red coins. A coin is removed at random and replaced by three of the other color.


Part 1
What is the probability that the removed coin is blue? Enter your answer as a simplified fraction.

The probability that the removed coin is blue is 3/5


Part 2 out of 3
If the first coin removed is blue, what is the probability of drawing a red coin after three red coins are put in the bag to replace the blue one?


The probability of drawing a red coin after three red coins are put in the bag to replace the blue one that has been removed is ______

Answer 1

After the red coins are added, we are left with 5 blue coins and 7 red coins.

The probability of drawing a red coin after the three red coins are put in the bag to replace the blue one that has been removed is 7/12.