A fair die has numbers 1,2,3,4,5 and 6 on its sides. It is tossed once. I win Rs. 1 if an odd number shows up; otherwise I lose Rs. 1. Let be the number that shows up and the money I win ( if I lose money). Which of the following is incorrect?
Tap an option to check your answer.
Checking your account…
A fair die has numbers 1,2,3,4,5 and 6 on its sides. It is tossed once. I win Rs. 1 if an odd number shows up; otherwise I lose Rs. 1. Let X be the number that shows up and Y the money I win (Y<0 if I lose money). Which of the following is incorrect? (A) Pr (X>Y)=1 (B) Pr (X=3| Y=1)=1/3 (C) E(Y)=0 (D) Pr (Y=1| X=5)=1
Probability and Bayes' theorem has come up 190 times in 7 exams since 2004.
This question is on Conditional probability and the multiplication rule, part of Probability and Bayes' theorem in Statistics.
Probabilities that change when you know something has happened.
TestStop has 28 past-paper questions on this subtopic; the nearest in year are below.
Question from the DSE 2009 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.