Answer 4) 1 of 9 is the correct answer.
There are 10 total toothpicks.
The probability of selecting one of the red toothpicks first is
5 out of 10 or 5/10.
After doing so, only 9 toothpicks remain.
The probability of selecting 1 of the 2 green toothpicks next is
2 out of 9 or 2/9.
The probability of selecting a red then a green toothpick is therfore:
(5/10) x (2/9) = 10/90, which reduces to 1/9.
