
Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class
Miscellaneous
Misc 1 (ii)
Misc 2 (i) Important You are here
Misc 2 (ii)
Misc 3
Misc 4
Misc 5 Important
Misc 6
Misc 7 Important
Misc 8 Important
Misc 9 Important
Misc 10 Important
Misc 11 (MCQ) Important
Misc 12 (MCQ)
Misc 13 (MCQ)
Question 1 Important Deleted for CBSE Board 2024 Exams
Question 2 Important Deleted for CBSE Board 2024 Exams
Question 3 Important Deleted for CBSE Board 2024 Exams
Question 4 Deleted for CBSE Board 2024 Exams
Question 5 Important Deleted for CBSE Board 2024 Exams
Question 6 Important Deleted for CBSE Board 2024 Exams
Last updated at Aug. 16, 2023 by Teachoo
Misc 2 A couple has two children, (i) Find the probability that both children are males, if it is known that at least one of the children is male.A Couple has two children, Let boy be denoted by b & girl be denoted by g So, S = {(b, b) ,(b, g),(g, b), (g, g)} We need to find probability that both children are males, if known that at least one of children is male Let E : Both children are males F : At least one child is male We need to find P(E|F) E : Both children are males E = {(b, b)} P(E) = 𝟏/𝟒 F : At least one child is male F = {(b, g), (g, b), (b, b)} P(F) = 𝟑/𝟒 Also, E ∩ F = {(b, b)} P(E ∩ F ) = 𝟏/𝟒 P(E|F) = (𝑃(𝐸 ∩ 𝐹))/(𝑃(𝐹)) = (𝟏/𝟒)/(𝟑/𝟒) = 1/3 ∴ Required Probability is 𝟏/𝟑