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 how many students have a brother or a sister. What is the probability that a student has a brother given that they have a sister?Has a brother Does not have a brotherHas a sister 2 3Does not have a sister 14 7AnswerAttempt 1 out of 5

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 family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons are there in the family ?

In a class of 26 students, 5 are female and 12 have an A in the class. There are 3 students who are female and have an A in the class. What is the probability that a student who has an A is a female?

A sociology teacher asked her students to complete a survey at the beginning of the year. One survey question asked, "Are you responsible?" Another question asked, "How many siblings do you have?"The probability that a student is irresponsible is 0.4, the probability that a student has 0 siblings is 0.5, and the probability that a student is irresponsible and has 0 siblings is 0.3.What is the probability that a randomly chosen student is irresponsible or has 0 siblings?Write your answer as a whole number, decimal, or simplified fraction.