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# Three coins are on a table, tails side up. Janssen pick one at random,

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Intern
Joined: 09 Apr 2017
Posts: 25
Location: Nepal
Concentration: Finance, Entrepreneurship
WE: Information Technology (Computer Software)
Three coins are on a table, tails side up. Janssen pick one at random,  [#permalink]

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04 Sep 2018, 02:46
3
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 100% (01:47) wrong based on 16 sessions

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Three coins are on a table, tails side up. Janssen pick one at random, with equal probability for each, and turns it over. On average, how many times would have to do this in order to get all three coins heads side up?
a. 7
b. 8
c. 9.
d. 10
e. 11
Senior Manager
Joined: 15 Oct 2017
Posts: 307
GMAT 1: 560 Q42 V25
GMAT 2: 570 Q43 V27
GMAT 3: 710 Q49 V39
Re: Three coins are on a table, tails side up. Janssen pick one at random,  [#permalink]

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04 Sep 2018, 08:35
Can you please share the OE?
Re: Three coins are on a table, tails side up. Janssen pick one at random,   [#permalink] 04 Sep 2018, 08:35
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