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If the probability that Stock A will increase in value during the next

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Re: If the probability that Stock A will increase in value during the next [#permalink] New post   16 Sep 2018, 09:47
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Using Venn Diagrams is also a great way to solve such a question.
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Re: If the probability that Stock A will increase in value during the next [#permalink] New post   24 Jun 2023, 18:11
i illustrated what was said in the previous answers to more visual folks like me
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Re: If the probability that Stock A will increase in value during the next [#permalink] New post   11 Jul 2023, 19:51
Answers have been complicated
a happening - .54
a not happening - .46
b happening - .68
b not happening - .32
for A not happening and B not happening to be max - find the lowest of the not happenings - 0.32
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Re: If the probability that Stock A will increase in value during the next [#permalink] New post   24 Jan 2024, 10:14
MHIKER wrote:
If the probability that Stock A will increase in value during the next month is 0.54, and the probability that Stock B will increase in value during the next month is 0.68. What is the greatest value for the probability that neither of these two events will occur?

A. 0.22
B. 0.32
C. 0.37
D. 0.46
E. 0.63

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This problem can be reduced to an problem in Set making it super easy to solve.

Imagine there are 100 datasets (A, B) A is true or false depending on wheather there is a increase in A ( same for B )

there will be 54 such As with true
there will be 68 usch Bs with true

Union of A U B is set of all pairs ( A, B ) where there is a rise in both stocks.

Similarly where there is no rise = Whole Set - (Rise in A) - (Rise in B) + (Rise in both A and B)

This is maximum when the (Rise in both A and B) = (Rise in A)
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Re: If the probability is 0.54 that Stock A will increase in value during [#permalink] New post   12 Apr 2024, 00:08
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Re: If the probability is 0.54 that Stock A will increase in value during [#permalink]
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