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Don't calculate second probability, instead calculate probability that sergey will come to the cafe in the same time both on the first path and on the second. Using this probability you can easily calculate second answer 1)What meaning of "equiprobable initial state"? P{state is GreenRed}=t1/(t1+t2+t3+t4), P{state is YellowRed}=t2/(t1+t2+t3+t4) ?
2)Can Sergey cross the street of Marks and then Engels, or first cross Engels and then Marks? 1)equiprobable initial state means it is equal probablity initial time is [0,t1+t2+t3+t4]
2) sergey has two choice: first cross crosswalk (which needn't wait just go directly) then cross
engels street (maybe wait for green traffic light)
second choice is first cross marks street(wait for green) then cross engels street(wait for green) (maybe he can first cross engels streect then marks street just choose optimal time.i.e. which green traffic arrive first,just first cross it..)
distance of both choice are equal...
Edited by author 30.04.2018 10:58
Edited by author 30.04.2018 10:59 |
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