A bag of 33 tulips contains 13 red tulip bulbs, 11 yellow tulip bulbs and 9 purple tulip bulbs. What is the probability that two randomly selected tulip bulbs are both red?

1 Answer
Feb 25, 2016

If you have a bag of 33 tulips and you randomly choose 2 from the bag ...


There are #(33!)/(2!xx31!)# ways to choose two bulbs regardless of color . This is your sample space #= 538# combinations.

Now, the event in this problem is choosing two red tulips . There are #(13!)/(2!xx11!)=78# combinations of choosing only red tulips.

#P("2 red")=78/538=13/88~~0.1477#

hope that helped