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If probability that it rains is 0.8 and probability that the

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Director
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Joined: 18 Apr 2005
Posts: 548
Location: Canuckland
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Kudos [?]: 12 [0], given: 0

If probability that it rains is 0.8 and probability that the [#permalink] New post 09 Jun 2005, 14:35
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A
B
C
D
E

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If probability that it rains is 0.8 and probability that the temperature is below 10C is 0.4, what is the range for probability that it rains or the the temperature is below 10C?

A) from 0 to 1, inclusive
B) from 0.2 to 1, inclusive
C) from 0.4 to 1, inclusive
D) from 0.6 to 1, inclusive
E) from 0.8 to 1, inclusive
Director
Director
User avatar
Joined: 18 Apr 2005
Posts: 548
Location: Canuckland
Followers: 1

Kudos [?]: 12 [0], given: 0

 [#permalink] New post 09 Jun 2005, 22:22
Not a very popular question,

OA should be E, imo, HH rocks as usual

since prob of rain is 0.8 then prob of rain OR temperature being lower than 10C is at least 0.8

if rain is A and temperature is B

then A or B = AUB >= A
  [#permalink] 09 Jun 2005, 22:22
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If probability that it rains is 0.8 and probability that the

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