A community for students.
Here's the question you clicked on:
 0 viewing
 one year ago
John drives to work and passes three sets of traffic lights. The probability that he has to stop at the first is 0.6, second 0.7, third 0.8.
He arrives late if he has to stop at any two sets of traffic lights.
Calculate the probability that he is late.
Answer is 0.788, how do I get it?
 one year ago
John drives to work and passes three sets of traffic lights. The probability that he has to stop at the first is 0.6, second 0.7, third 0.8. He arrives late if he has to stop at any two sets of traffic lights. Calculate the probability that he is late. Answer is 0.788, how do I get it?

This Question is Closed

kropot72
 one year ago
Best ResponseYou've already chosen the best response.1P(stops at first & second) = 0.6 * 0.7 = 0.42 P(does not stop at second) = 1  0.7 = 0.3 P(stops at first & third) = 0.6 * 0.3 * 0.8 = 0.144 P(does not stop at first) = 1  0.6 = 0.4 P(stops at second and third) = 0.4 * 0.7 * 0.8 = 0.224 P(arrives late) = 0.42 + 0.144 + 0.224 = ?

nickersia
 one year ago
Best ResponseYou've already chosen the best response.0Oh! I understand now how it's done! I did it slightly different just to make it more clear for me :) P(does not stop at third) = 0.2 P(stops at first and second) = 0.6 * 0.7 * 0.2 = 0.084 P(does not stop at second) = 0.3 P(stops at first & third) = 0.6 * 0.3 * 0.8 = 0.144 P(does not stop at first) = 0.4 P(stops at second and third) = 0.4 * 0.7 * 0.8 = 0.224 P(stops at first, second and third) = 0.6 * 0.7 * 0.8 = 0.336 P(late) = 0.084 + 0.144 + 0.224 + 0.336 = 0.788 Thank you very much for all the help! I appreciate it! :)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.