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What is the probability that event E or event F or both will

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What is the probability that event E or event F or both will [#permalink] New post 09 May 2012, 12:43
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What is the probability that event E or event F or both will occur?

(1) The probability that event E will occur is 0.6
(2) The probability that event F will occur is 0.4
[Reveal] Spoiler: OA
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Re: GWD #18 M32 [#permalink] New post 09 May 2012, 12:47
Independent probability

Ifor example, if two coins are flipped the chance of both being heads is [18]

Mutually exclusive
If either event A or event B or both events occur on a single performance of an experiment this is called the union of the events A and B denoted as .

For example, the chance of rolling a 1 or 2 on a six-sided die is

This is from Wikipedia. I found this when I was searching for the explanation for this question.
But I am still confused the difference between independent probability and mutually exclusive.
To me, they sound the same. Help me understand them.
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Re: What is the probability that event E or event F or both will [#permalink] New post 15 Jun 2012, 03:10
eybrj2 wrote:
What is the probability that event E or event F or both will occur?

(1) The probability that event E will occur is 0.6
(2) The probability that event F will occur is 0.4

What is asked is the value of P(E)+P(F)+P(E union F)
we cannot determine (E union F) combining 1 & 2 as well. Hence the answer is E
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Re: What is the probability that event E or event F or both will [#permalink] New post 29 Oct 2012, 14:35
shouldn't this be P(e) + P(f) and so the answer C Why E?
Re: What is the probability that event E or event F or both will   [#permalink] 29 Oct 2012, 14:35
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