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 sister?Has a brother Does not have a brotherHas a sister 8 4Does not have a sister 2 6

In a class of 30 students, 21 have a brother and 14 have a sister. There are 4 students who do not have any siblings. What is the probability that a student has a sister given that they have a brother?Answer

In a class of students, the following data table summarizes the gender of the students and whether they have an A in the class. What is the probability that a student has an A given that the student is female?Female MaleHas an A 16 4Does not have an A 2 8

Ten people were asked if they have a brother or sister. This Venn diagram shows the results. A person is randomly chosen from those shown in the Venn diagram.Let event A = The person has a sister.Let event B = The person has a brother.What does P(B|A) = 0.50 mean in terms of the Venn diagram?A.Of the 10 people surveyed, 5 of these have only a brother or only a sister.B.Of the 4 people who have a sister, 2 of these also have a brother.C.Of the 10 people surveyed, 5 of these have a brother.D.Of the 4 people who have a brother, 2 of these also have a sister.SUBMITarrow_backPREVIOUS

In a class of students, the following data table summarizes how many students have a cat or a dog. What is the probability that a student chosen randomly from the class does not have a dog?Has a cat Does not have a catHas a dog 10 3Does not have a dog 4 5

A survey asked students whether they have any siblings and pets. The survey data are shown in the relative frequency table.  Siblings No siblings TotalPets 0.3 0.15 0.45No pets 0.45 0.1 0.55Total 0.75 0.25 1.0Given that a student has a sibling, what is the likelihood that he or she does not have a pet?A.40%B.60%C.45%D.About 82%