Question

In a class of students, the following data table summarizes how many students have a brother or a sister. What is the probability that a student chosen randomly from the class has a sibling?

Has a brother Does not have a brother
Has a sister 2 5
Does not have a sister 4 19

Answer 1

[AI-generated answer — Bot GPT 3.5]

Total number of students with siblings = 2 (has a brother) + 2 (has a sister) = 4

Total number of students = 2 (has a brother) + 5 (does not have a brother) + 4 (has a sister) + 19 (does not have a sister) = 30

Probability that a student chosen randomly from the class has a sibling = 4/30 = 2/15 = 0.1333
Therefore, the probability that a student chosen randomly from the class has a sibling is 0.1333 or 13.33%.