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

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Manager
Joined: 03 Oct 2008
Posts: 61
What is the probability that event E or event F or both will [#permalink]

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09 Oct 2008, 05:16
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Manager
Joined: 22 Sep 2008
Posts: 120

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09 Oct 2008, 05:18
are they mutual?

i think there is some problem in question.. i am getting prob. > 1

0.6 + 0.4 + 0.6 *0.4 > 1 which is not write..

Intern
Joined: 15 Aug 2008
Posts: 19

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09 Oct 2008, 15:34
okay,

the prob is 1- "the prob of something else happens"

by having both probabilities (.6 + .4 = 1) we know that there are only two events and no other, third event, can happen.

therefore the answer is C. either this or there is something wrong with the Question..!
Intern
Joined: 01 Nov 2005
Posts: 47
Location: New jersey

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09 Oct 2008, 17:16
1
KUDOS
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.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient

Formula for event EUF i.e (either event E or event f or both occur) = E + F - (E&F)

In above, we are not provided with (E&F) therefore, answer is E i.e statement 1 and 2 are not sufficient.
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SVP
Joined: 17 Jun 2008
Posts: 1529

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09 Oct 2008, 22:34
1
KUDOS
Agree with the approach from sudhanshu_arora. Answer should be E.
Re: event   [#permalink] 09 Oct 2008, 22:34
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# What is the probability that event E or event F or both will

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