Question

question 16 of 25
let event ( a = ) the animal is a bird.
let event ( b = ) the animal can fly.
which outcomes are in ( a ) and ( b )?
a. {canary, seagull, crow, mosquito}
b. {ostrich, emu, canary, seagull, crow}
c. {ostrich, emu, canary, seagull, crow, mosquito}

Explanation:

Step1: Understand event A and B

Event A: animal is a bird. Event B: animal can fly. We need to find animals that satisfy both.

Step2: Check each animal

• Ostrich: is a bird (A) but can't fly (not B).
• Emu: is a bird (A) but can't fly (not B).
• Canary: is a bird (A) and can fly (B).
• Pig: not a bird (not A).
• Seagull: is a bird (A) and can fly (B).
• Crow: is a bird (A) and can fly (B).
• Mosquito: can fly (B), but in the context of this table (assuming the "Is a bird" column is for biological birds, mosquito is an insect not a bird in biological terms but if we go by the table's check - mark logic, if we consider the table's "Is a bird" and "Can fly" columns, and assume that for the purpose of this problem, the check - marks are the only criteria. If we assume that the problem is just based on the check - marks in the table (even though in reality mosquito is not a bird), mosquito has a check - mark in "Can fly" and no check - mark in "Is a bird" which is wrong in biological terms. But if we follow the table's check - mark logic for the problem's sake (maybe a mis - design in the table), and we are to pick based on check - marks:
• If we consider the problem as a set - based operation (A ∩ B, where A is the set of animals with a check in "Is a bird" and B is the set of animals with a check in "Can fly"), then animals with checks in both columns are Canary, Seagull, Crow. But if we assume that the problem has an error and mosquito is included (maybe a data - entry error in the table), and we go by the options:
• Option A has Canary (A and B), Seagull (A and B), Crow (A and B), Mosquito (if we wrongly assume it's in A ∩ B based on table check - marks).
• Option B has Ostrich (A not B) and Emu (A not B) which are wrong.
• Option C has Ostrich (A not B) and Emu (A not B) which are wrong.

So, if we assume the problem has a table error and we go by the check - marks (even for mosquito wrongly), the answer is A.

Answer:

A. {canary, seagull, crow, mosquito}