anonymous
  • anonymous
Need help with a problem. Just tell me where to go with it; I don't want anyone to solve it for me. Just confused... I tried the counting principle but it didn't work. "Suppose you roll two number cubes and pick a letter of the alphabet at random. Find the probability you roll two even numbers and pick one of the vowels a, e, i, o, or u"
Probability
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what is the probability of rolling an even number on one of the cubes? What is the probability of choosing one of the vowels? I mean on there own
anonymous
  • anonymous
Probability of choosing an even number on either cube is 1/2, and the probability for choosing a vowel is 5/26. Do I just add them together?
anonymous
  • anonymous
are they independent events?

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anonymous
  • anonymous
...Yes, I think.
anonymous
  • anonymous
well they cannot impact each other so they are independent events
anonymous
  • anonymous
right. And the probability for rolling to even numbers is 1/4
anonymous
  • anonymous
two*
anonymous
  • anonymous
Unfortunately I do not remeber the formula for independent events so I would check you textbook or formula sheet . . . if I had to guess I would say it is multiplying them together so \[\frac{ 1 }{ 2 }*\frac{ 1 }{ 2 }*\frac{ 5 }{ 26 }\]
anonymous
  • anonymous
Let's see...
anonymous
  • anonymous
Ah! That's it. Thanks.
anonymous
  • anonymous
yea a quick way to see that it is not adding is that it would give you over 100% chance of success anyways don't forget to close the question

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