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