anonymous
  • anonymous
A and B are playing the following game.A starts and tosses a fair coin .if outcome is head.A wins.if A fails to win ,passes the coin to B,who then attempts to win on her toss as before,a win occurs if the outcome is head.they continue to toss the coin back and forth until one of them wins.what is the probability of A winning the game?
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
geometric series ...
King
  • King
1/2?
King
  • King
tomas suppose in his first chance itself A gets a head,he wins so there probability is 1/2 ....

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More answers

anonymous
  • anonymous
no... what if he don't?
King
  • King
then, we multiply or add?
King
  • King
s it like x+x^2+x^3+...+x^n?
anonymous
  • anonymous
1/2+1/2*1/2*1/2+1/2*1/2*1/2*1/2*1/2+... H TTH TTTTH ...
anonymous
  • anonymous
mevereet explain
anonymous
  • anonymous
tomas u can also
anonymous
  • anonymous
Tomas did a nice job, look again, the first blank is for A winning on first flip ______ or 1/2 the second blank is for A winning on the second flip _______ 1/2 times 1/2 the third blank is for A winning on the third flip _______ 1/2 times 1/2 times 1/2 and so on and so on ..... forever .... since it is a geometric series..... These are really challenging questions, using probability and precalculus at the same time .... very challenging and frustrating at times
anonymous
  • anonymous
second blank should be 1/2*1/2*1/2 because first throw: first player get tails second throw: second player MUST get tails too, because we are searching for probability that first wons third throw: first player gets heads and so on
anonymous
  • anonymous
hey that is confusing
anonymous
  • anonymous
opps, thanks Tomas
anonymous
  • anonymous
yes, these are very tough questions ...
anonymous
  • anonymous
which book will help?or any approach?
anonymous
  • anonymous
do you have a textbook?
anonymous
  • anonymous
did you notice geometric series in this problem? do you know how to use them?
anonymous
  • anonymous
ya,nagar and das....nd hammond
anonymous
  • anonymous
u may explain the g.p also
anonymous
  • anonymous
some good videos on Khan Academy http://www.khanacademy.org/#browse
anonymous
  • anonymous
i think he don't even understand what we said?
anonymous
  • anonymous
Here is a video on the second question that you asked today http://www.khanacademy.org/video/expected-value--e-x?playlist=Probability
anonymous
  • anonymous
any buk
anonymous
  • anonymous
Here is a video on the first question from today http://www.khanacademy.org/video/compound-probability-of-independent-events?playlist=Probability
anonymous
  • anonymous
tomas u can help i guess
anonymous
  • anonymous
with what?

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