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The probability which event E occurs is 0.7 and the probability which

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Math Revolution GMAT Instructor
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The probability which event E occurs is 0.7 and the probability which  [#permalink]

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New post 09 Jan 2017, 02:40
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A
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C
D
E

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Question Stats:

59% (00:42) correct 41% (01:19) wrong based on 116 sessions

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The probability which event E occurs is 0.7 and the probability which event F occurs is 0.3. When event E and event F are independent, what is the range including the probability that neither E occurs nor F occurs?

A. 0.01~0.1
B. 0.1~0.2
C. 0.2~0.4
D. 0.4~0.6
E. 0.6~0.8

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The probability which event E occurs is 0.7 and the probability which  [#permalink]

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New post 09 Jan 2017, 02:52
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MathRevolution wrote:
The probability which event E occurs is 0.7 and the probability which event F occurs is 0.3. When event E and event F are independent, what is the range including the probability that neither E occurs nor F occurs?

A. 0.01~0.1
B. 0.1~0.2
C. 0.2~0.4
D. 0.4~0.6
E. 0.6~0.8


This Question just Looks extremely messy.
I have never heard this statement -> "range including the probability"
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Re: The probability which event E occurs is 0.7 and the probability which  [#permalink]

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New post 09 Jan 2017, 10:12
p(not E) * P(Not F) = 3/10 * 7/10 = 21/100 = 0.21 --> 0.2 < 0.21 < 0.4 --> Ans C
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Re: The probability which event E occurs is 0.7 and the probability which  [#permalink]

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New post 10 Jan 2017, 19:39
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1
==> It is about the probability that event E and F don’t occur.
Then, (1-0.7)(1-0.3)=(0.3)(0.7)=0.21 is derived, which includes C.

Answer: C
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Re: The probability which event E occurs is 0.7 and the probability which  [#permalink]

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New post 10 Jul 2018, 07:12
stonecold wrote:
MathRevolution wrote:
The probability which event E occurs is 0.7 and the probability which event F occurs is 0.3. When event E and event F are independent, what is the range including the probability that neither E occurs nor F occurs?

A. 0.01~0.1
B. 0.1~0.2
C. 0.2~0.4
D. 0.4~0.6
E. 0.6~0.8


This Question just Looks extremely messy.
I have never heard this statement -> "range including the probability"


This question probably needs a verbal expert to phrase it in a better way or maybe word confusion was part of the cloak to make this question more confusing.
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Re: The probability which event E occurs is 0.7 and the probability which &nbs [#permalink] 10 Jul 2018, 07:12
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