last survivor status - curtate

[Sox34]

T(x) and T(y) are independent. you are also given the following info:

k q_x+k q_y+k
0 .08 .1
1 .09 .15
2 .1 .2

Determine the probability that the curtate future lifetime of (xy_last surv) equals 1

a) Less than .03
b) .03 - .0305
c) .0305 - .031
d) .031 - .0315
e) at least .0315

I think my formula is incorrect for last survivor curtate functions...

[soyleche]

Do you know what the answer is?

[Sox34]

B

[Brutè]

Originally Posted by Sox34

I think my formula is incorrect for last survivor curtate functions...

what formula are you using?

[JJ_Franch]

The answer is 0.030258. Sox, I don't know what formula you have but think logically: The Prob (of x to die in 1 and y die in 0) + Prob (of y to die in 1 and x in 0) + Prob (of both die in time 1).

[Brutè]

JJ beat me to it!

[Sox34]

thanks - I was using the formula for JSS -forgetting that it was not the formula for LSS and was so stuck on why it wasn't working that I didn't think it through. I guess that's a lesson in not blindly trying to apply formulas!

Thanks for the help all

[JJ_Franch]

Originally Posted by Sox34

thanks - I was using the formula for JSS -forgetting that it was not the formula for LSS and was so stuck on why it wasn't working that I didn't think it through. I guess that's a lesson in not blindly trying to apply formulas!

Thanks for the help all

Another lesson, this one is a lot harder to implement, is to think in several dimensions. Think outside of the box. People with that ability have no problems with 3/M. I'm just getting there myself. It is quite inlightening.

[Brutè]

Originally Posted by JJ_Franch

Another lesson, this one is a lot harder to implement, is to think in several dimensions. Think outside of the box. People with that ability have no problems with 3/M. I'm just getting there myself. It is quite inlightening.

How did you get there? You seem to have an excellent grasp of everything. I've been studying this crap for years and still feel like I'll be borderline again.

[JJ_Franch]

Originally Posted by Brutè

How did you get there? You seem to have an excellent grasp of everything. I've been studying this crap for years and still feel like I'll be borderline again.

Course 4. I don't know what happened. All of a sudden, I have better understanding of probabilities and I don't think one dimensional. Could be also that the success encouraged me. I was getting down on myself.