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anonymous

  • 5 years ago

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?

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  1. anonymous
    • 5 years ago
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    geometric series ...

  2. King
    • 5 years ago
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    1/2?

  3. King
    • 5 years ago
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    tomas suppose in his first chance itself A gets a head,he wins so there probability is 1/2 ....

  4. anonymous
    • 5 years ago
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    no... what if he don't?

  5. King
    • 5 years ago
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    then, we multiply or add?

  6. King
    • 5 years ago
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    s it like x+x^2+x^3+...+x^n?

  7. anonymous
    • 5 years ago
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    1/2+1/2*1/2*1/2+1/2*1/2*1/2*1/2*1/2+... H TTH TTTTH ...

  8. anonymous
    • 5 years ago
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    mevereet explain

  9. anonymous
    • 5 years ago
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    tomas u can also

  10. anonymous
    • 5 years ago
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    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

  11. anonymous
    • 5 years ago
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    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

  12. anonymous
    • 5 years ago
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    hey that is confusing

  13. anonymous
    • 5 years ago
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    opps, thanks Tomas

  14. anonymous
    • 5 years ago
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    yes, these are very tough questions ...

  15. anonymous
    • 5 years ago
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    which book will help?or any approach?

  16. anonymous
    • 5 years ago
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    do you have a textbook?

  17. anonymous
    • 5 years ago
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    did you notice geometric series in this problem? do you know how to use them?

  18. anonymous
    • 5 years ago
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    ya,nagar and das....nd hammond

  19. anonymous
    • 5 years ago
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    u may explain the g.p also

  20. anonymous
    • 5 years ago
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    some good videos on Khan Academy http://www.khanacademy.org/#browse

  21. anonymous
    • 5 years ago
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    i think he don't even understand what we said?

  22. anonymous
    • 5 years ago
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    Here is a video on the second question that you asked today http://www.khanacademy.org/video/expected-value--e-x?playlist=Probability

  23. anonymous
    • 5 years ago
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    any buk

  24. anonymous
    • 5 years ago
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    Here is a video on the first question from today http://www.khanacademy.org/video/compound-probability-of-independent-events?playlist=Probability

  25. anonymous
    • 5 years ago
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    tomas u can help i guess

  26. anonymous
    • 5 years ago
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    with what?

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