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MAS-I Old Exam S Forum

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  #21  
Old 06-18-2018, 06:21 PM
mec06e mec06e is offline
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I have been using TIA, but I was wondering if anyone would recommend Coaching Actuaries, Mahler or something else?

I think I mainly need to focus on doing more practice problems and it would be nice to have access to a forum for questions.
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  #22  
Old 06-18-2018, 06:23 PM
Abraham Weishaus Abraham Weishaus is offline
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Quote:
Originally Posted by JDeee40 View Post
could someone help explain the logic in ASM lesson 14 example 14B?

'express trains arrive in a poisson process at a rate of 4 per hour. Local trains arrive in a poisson rate of 12 per hour. Calculate the probability that at least 4 locals will arrive before 3 express'

I understand the probability that a local arrives before express is 4/(4+12) and that the probability of 4 local before 3 express is (6 C 4) (.75^4)(.25^2)

but why does he lock it at 6 trains? ...he says the p of 4 or more of the next 6 trains are local is..

(6 C 4) (.75^4)(.25^2) + (6 C 5) (.75^5)(.25^1) + (6 C 6) (.75^6)

why do we always expect 6? Couldn't there be 5 local and 2 express...6 local and 2 express...7 local and 2 express?
This question was answered at length in another thread.
But in brief, to solve a probability question involving a set of events, you want to break the set up into mutually exclusive subevents, so that the probability of the set is the sum of the probabilities of the subsets.


By looking at all subsets of what the first 6 trains can be, you achieve this goal.


Your method does not lead to mutually exclusive subevents. For example, LLLLLEEL would be both 5 locals and 2 expresses and 6 locals and 2 expresses.
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  #23  
Old 06-18-2018, 06:58 PM
MathDoctorG MathDoctorG is offline
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Quote:
Originally Posted by mec06e View Post
I have been using TIA, but I was wondering if anyone would recommend Coaching Actuaries, Mahler or something else?

I think I mainly need to focus on doing more practice problems and it would be nice to have access to a forum for questions.
It sounds like you may already be aware of this, as a previous TIA user, but just in case, the MAS-I TIA course has around 1500 problems - most already have a video solution. Also, I answer questions in the TIA MAS-I forum usually within 24 hours.
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  #24  
Old 06-19-2018, 01:13 AM
YetAnotherCareerChanger YetAnotherCareerChanger is offline
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Attempt #2 at this exam, missed it by 1 question which is unbelievably frustrating.
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  #25  
Old 06-20-2018, 06:30 PM
mec06e mec06e is offline
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Quote:
Originally Posted by MathDoctorG View Post
It sounds like you may already be aware of this, as a previous TIA user, but just in case, the MAS-I TIA course has around 1500 problems - most already have a video solution. Also, I answer questions in the TIA MAS-I forum usually within 24 hours.
Thanks, Are more problems being released for the Fall 2018 sitting? In the work problems section I believe there were only 851 problems for Spring 2018.
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  #26  
Old 06-21-2018, 07:04 PM
ButtressWOPersonality ButtressWOPersonality is offline
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All in. Took the last sitting of S. Excited to finally finish this thing and get my ACAS.
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  #27  
Old 06-21-2018, 07:52 PM
MathDoctorG MathDoctorG is offline
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Quote:
Originally Posted by mec06e View Post
Thanks, Are more problems being released for the Fall 2018 sitting? In the work problems section I believe there were only 851 problems for Spring 2018.
Yes, some will be added for the new lessons. Right now the counts are 850 for the problem system, another 400 or so in the sample exams and 250 or so more worked out in the lessons.
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  #28  
Old 06-25-2018, 04:45 PM
bhoerlein2012 bhoerlein2012 is offline
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Now that I have passed C, I plan on taking this exam in the Fall! I will be using TIA.
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  #29  
Old 06-27-2018, 02:41 AM
kshinforthewin kshinforthewin is offline
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Didn’t pass C this past sitting. Debating between this or MAS-II. I am leaning towards this more though. How does one study for this exam? I heard TIA is good, I took a look at the source material as well. Are there practice exams that you can grind out with Coaching Actuaries like the prelim exams?
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  #30  
Old 06-29-2018, 01:38 PM
YetAnotherCareerChanger YetAnotherCareerChanger is offline
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Starting my studying for this today...

One freaking question... makes me so mad. The only real pro is that if I can pass this and 6 in one go each, then destination = Hawaii for ACAS recognition.
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