Problem 5: Lightsabers

Posted: March 9, 2011 in Problems

 

General Grievous

There are many different colors that lightsabers can be. Assume that 40% are blue, 30% are green, 20% are red, and 10% are any other color.

a.) Using these percentages, how many of each color would be in a group of 10 lightsabers?

b.) If General Grievous selects two lightsabers at random from this group of 10 (with no replacements), what is the probability that both of them are blue?

c.) Using that same group of 10, what is the probability that General Grievous will select a red lightsaber given that his first lightsaber picked was a green lightsaber?

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Comments
  1. pythagorean empire says:

    a) There will be 4 blue, 3 green, 2 red, and one other color
    b)There is a 2/15 chance of pulling double blue
    c)He has a 2/9 chance if he has already pulled a green from the bag

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