United Lowers Fares If and Only If Both JetBlue Buys

question 82

Multiple Choice

United lowers fares if and only if both JetBlue buys planes and Delta advertises a sale, provided that American hires pilots.

• A) (U ≡ A) • (J ≡ D)
• B) A ⊃ [U ≡ (J • D)]
• C) [U ≡ (J • D)] ⊃ A
• D) A ⊃ [(U ⊃ J) • (D ⊃ U]
• E) [U ⊃ (J • D)] ⊃ A

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Definitions:

Sex-Linked Traits

Traits associated with genes located on sex chromosomes, often displaying different patterns of inheritance in males and females due to their chromosomal configuration.

Sex Chromosomes

Chromosomes that determine the sex of an organism, typically one of two kinds: X and Y in mammals.

X Chromosome

One of the two sex chromosomes, playing a key role in determining genetic sex and involved in various genetic disorders.

Y Chromosome

A sex chromosome typically associated with male characteristics in species that have XY sex-determination systems, carrying genes important for male reproduction.