Question 3 6 pts The following table represents gas well completions during 1986 in North and South America Source American Gas Association 1987 Gas Facts p 50 a b c P D P N North America N South America N TOTALS P D and N P D and N P D and N P D and N P D or N P D or N P D or N P D or N Useful Formulas Rule 1 P A or B P A P B P A and B Rule 2 P A or B P A and B P A and B Rule 3 P A B P B Rule 4 P AB Dry D 14 131 404 14 535 Not dry D 31 575 2 563 34 138 P A XP BA RA XP BARA YB RA TOTALS 45 706 2 967 48 643 Note The sign means complement of an event