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Category > Statistics Posted 09 Jun 2017 My Price 3.00

A woman has n keys, of which one will open her door.

A woman has n keys, of which one will open her door.

If she tries the keys at random, discarding those that do not work, what is the probability that she will open the door on her kth try? (k = 1; 2; ... ; n.)

What if she doesn't discard previously tried keys?

Answers

(8)
Status NEW Posted 09 Jun 2017 06:06 AM My Price 3.00

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file 1496991361-Answer.docx preview (138 words )
A----------- wo-----------man----------- ha-----------s n----------- ke-----------ys,----------- of----------- wh-----------ich----------- on-----------e w-----------ill----------- op-----------en -----------her----------- do-----------or.-----------If -----------she----------- tr-----------ies----------- th-----------e k-----------eys----------- at----------- ra-----------ndo-----------m, -----------dis-----------car-----------din-----------g t-----------hos-----------e t-----------hat----------- do----------- no-----------t w-----------ork-----------, w-----------hat----------- is----------- th-----------e p-----------rob-----------abi-----------lit-----------y t-----------hat----------- sh-----------e w-----------ill----------- op-----------en -----------the----------- do-----------or -----------on -----------her----------- kt-----------h t-----------ry?----------- (k----------- = -----------1; -----------2; -----------...----------- ; -----------n.)-----------Wha-----------t i-----------f s-----------he -----------doe-----------sn'-----------t d-----------isc-----------ard----------- pr-----------evi-----------ous-----------ly -----------tri-----------ed -----------key-----------s? ----------- An-----------swe-----------r -----------1) -----------Wit-----------hou-----------t r-----------epl-----------ace-----------men-----------t: -----------The----------- fe-----------w f-----------irs-----------t p-----------art-----------icu-----------lar----------- ca-----------ses----------- wo-----------uld----------- be----------- k=-----------1, -----------whi-----------ch -----------mea-----------ns -----------tha-----------t t-----------he -----------1st----------- at-----------tem-----------pt -----------is -----------suc-----------ces-----------sfu-----------l, -----------so -----------P(1-----------)=1-----------/n,----------- k=-----------2, -----------whi-----------ch -----------mea-----------ns -----------the----------- fi-----------rst----------- is-----------
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