what is the answer to this?

Statistics
Tutor: None Selected Time limit: 1 Day

A coin is biased so  that the probability of tails is 1/3. What is the probability of obtaining exactly two tails on five tosses of the coin ?

Jun 8th, 2015

Thank you for the opportunity to help you with your question!

A coin is biased so  that the probability of tails is 1/3. What is the probability of obtaining exactly two tails on five tosses of the coin ?

This is a binomial distribution with P(success) = 1/3 and n = 5

P(x =2) = 5C 2  (1/3)² (2/3)^3

= 5 x 4/ 2! (1/9) ( 8/27)

= 10 x 8/243

=80/243

= 0.329 approx to 3 decimal places


Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 8th, 2015

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Jun 8th, 2015
...
Jun 8th, 2015
Dec 4th, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer