Multiple choice

One purse contains $6$ copper coins and $1$ silver coin; a second purse contains $4$ copper coins. Five coins are drawn from the first purse and put into the second, and then $2$ coins are drawn from the second and put into the first. The probability that the silver coin is in the second purse is?

  1. $1/2$
  2. $4/9$
  3. $5/9$
  4. $2/3$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is a probability problem involving state transitions. The silver coin moves between purses. The calculation leads to 5/9.