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May 9th, 2014, 03:20 PM   #1
Joined: May 2014
From: germany

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statistics help please

Hi all,

I really need your help to solve these problems.

Thanks in advance.

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May 14th, 2014, 07:59 PM   #2
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Joined: Nov 2013
From: Baku

Posts: 502
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Math Focus: Geometry
P(fuel AND navigation) = 0.45

Now draw 2 intersecting circles. The intersection is 0.45, first circle is 0.8, so non-intersecting part of first circle is 0.35, and the second circle is 0.45, therefore non-intersecting part is 0.1.
a is 0.45
b is 0.35
c is 0.35+0.45+0.1=0.9.

Second problem is also easy. Sum up each row and column.
Example probability of northeast is (sum of northeast column)/(total sum)
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