Probability Math 114 on Webwork

Mathematics
Tutor: None Selected Time limit: 1 Day

https://webwork.math.nau.edu/webwork2_files/tmp/EA...

 If a member of the department is chosen at random to serve on a university committee, what is the probability (in decimal form) that the chosen representitive will have between 10 and 25 years of service? 
Answer: .48

(c) What is the probability the representative above will have less than 25 years of service given that the person has less than 35 years of service?

Oct 14th, 2015

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

the probability of representative having less than 25 years of service is

35/50 = 0.7

the probability of representative having less than 35 years of service is

45/50 = 0.9

Therefore, the probability of having less than 25 years given having less than 35 years is

0.7/0.9 = 0.777

Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 14th, 2015

says its wrong :(, thanks for your help tho

Oct 14th, 2015

Hmmm... should be right. Maybe it's a rounding error.

Oct 14th, 2015

no it was right, sorry the question just wanted the .7/.9, it didnt want the solution. Sometimes WebWork can be annoying like that, thank you for your time and help :)

Oct 14th, 2015

Oh, ok :)  You're welcome.

Oct 14th, 2015

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