The following table represents gas well completions during 1986 in North and South America. Source: American Gas Association, 1987 Gas Facts, p. 50.     D D’       Dry Not Dry   N North America 14,131 31,575 45,706 N’ South America 404 2,563 2,967     14,535 34,138 48,673 Calculate P (D or N). P(D’ or N’) P(D or N’) P(D’ or N)

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The following table represents gas well completions during 1986 in North and South America. Source: American Gas Association, 1987 Gas Facts, p. 50.

 

 

D

D’

 

 

 

Dry

Not Dry

 

N

North America

14,131

31,575

45,706

N’

South America

404

2,563

2,967

 

 

14,535

34,138

48,673

Calculate

  1. P (D or N).
  2. P(D’ or N’)
  3. P(D or N’)
  4. P(D’ or N)
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