Ask Question
25 September, 22:18

In a class 26 of students, 17 have a brother and 7 have a sister. There are 4 students who do not have any siblings. What is the probability that a student has a brother given that they have a sister

+1
Answers (1)
  1. 25 September, 22:36
    0
    Number of students = 26

    Number of students without siblings = 4

    ⇒ Number of students with at least one siblings = 26 - 4 = 22

    Number of students with brothers = 17

    Number of students with sisters = 7

    ⇒ Number of students with both a brother and a sister = 17 + 7 - 22 = 2

    P (student has a brother, given that they have a sister) = 2/7

    Answer: 2/7
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “In a class 26 of students, 17 have a brother and 7 have a sister. There are 4 students who do not have any siblings. What is the ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers