Probability - Calculate probability of win on multiple bets

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I've got this situation. There's a game where I can bet on the result of a random generated number that could be $1$ or $2$. In fact, I've got $50%$ probability that the number will be $1$ and $50%$ probability that it will be $2$.
But what if I bet $10$ times, and I win if I get $1$ just one time? I mean, I could get $2$ four times but then get $1$ and win. Is it true that, if in that $50%$ of lose probability there's another bet with $50%$ probability of win, the final probability is $75%$?
Thanks!







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  • What do you mean by "final probability"? It is true that you have a 75% chance of winning by the end of two turns.
    – Harambe
    Mar 27 '17 at 18:47










  • This is not clear. The probability of guessing wrong ten times in a row is $frac 12^10approx 0.000977$. Is that what you are asking?
    – lulu
    Mar 27 '17 at 18:48










  • @Shanye2020 That's exactly what I mean. Thanks!
    – DamiToma
    Mar 27 '17 at 18:50










  • @lulu Yes I'm asking that. Sorry for my english, I'm italiano. Thanks!
    – DamiToma
    Mar 27 '17 at 18:50














up vote
0
down vote

favorite












I've got this situation. There's a game where I can bet on the result of a random generated number that could be $1$ or $2$. In fact, I've got $50%$ probability that the number will be $1$ and $50%$ probability that it will be $2$.
But what if I bet $10$ times, and I win if I get $1$ just one time? I mean, I could get $2$ four times but then get $1$ and win. Is it true that, if in that $50%$ of lose probability there's another bet with $50%$ probability of win, the final probability is $75%$?
Thanks!







share|cite|improve this question






















  • What do you mean by "final probability"? It is true that you have a 75% chance of winning by the end of two turns.
    – Harambe
    Mar 27 '17 at 18:47










  • This is not clear. The probability of guessing wrong ten times in a row is $frac 12^10approx 0.000977$. Is that what you are asking?
    – lulu
    Mar 27 '17 at 18:48










  • @Shanye2020 That's exactly what I mean. Thanks!
    – DamiToma
    Mar 27 '17 at 18:50










  • @lulu Yes I'm asking that. Sorry for my english, I'm italiano. Thanks!
    – DamiToma
    Mar 27 '17 at 18:50












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I've got this situation. There's a game where I can bet on the result of a random generated number that could be $1$ or $2$. In fact, I've got $50%$ probability that the number will be $1$ and $50%$ probability that it will be $2$.
But what if I bet $10$ times, and I win if I get $1$ just one time? I mean, I could get $2$ four times but then get $1$ and win. Is it true that, if in that $50%$ of lose probability there's another bet with $50%$ probability of win, the final probability is $75%$?
Thanks!







share|cite|improve this question














I've got this situation. There's a game where I can bet on the result of a random generated number that could be $1$ or $2$. In fact, I've got $50%$ probability that the number will be $1$ and $50%$ probability that it will be $2$.
But what if I bet $10$ times, and I win if I get $1$ just one time? I mean, I could get $2$ four times but then get $1$ and win. Is it true that, if in that $50%$ of lose probability there's another bet with $50%$ probability of win, the final probability is $75%$?
Thanks!









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edited Mar 27 '17 at 19:03









Andre.J

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asked Mar 27 '17 at 18:40









DamiToma

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  • What do you mean by "final probability"? It is true that you have a 75% chance of winning by the end of two turns.
    – Harambe
    Mar 27 '17 at 18:47










  • This is not clear. The probability of guessing wrong ten times in a row is $frac 12^10approx 0.000977$. Is that what you are asking?
    – lulu
    Mar 27 '17 at 18:48










  • @Shanye2020 That's exactly what I mean. Thanks!
    – DamiToma
    Mar 27 '17 at 18:50










  • @lulu Yes I'm asking that. Sorry for my english, I'm italiano. Thanks!
    – DamiToma
    Mar 27 '17 at 18:50
















  • What do you mean by "final probability"? It is true that you have a 75% chance of winning by the end of two turns.
    – Harambe
    Mar 27 '17 at 18:47










  • This is not clear. The probability of guessing wrong ten times in a row is $frac 12^10approx 0.000977$. Is that what you are asking?
    – lulu
    Mar 27 '17 at 18:48










  • @Shanye2020 That's exactly what I mean. Thanks!
    – DamiToma
    Mar 27 '17 at 18:50










  • @lulu Yes I'm asking that. Sorry for my english, I'm italiano. Thanks!
    – DamiToma
    Mar 27 '17 at 18:50















What do you mean by "final probability"? It is true that you have a 75% chance of winning by the end of two turns.
– Harambe
Mar 27 '17 at 18:47




What do you mean by "final probability"? It is true that you have a 75% chance of winning by the end of two turns.
– Harambe
Mar 27 '17 at 18:47












This is not clear. The probability of guessing wrong ten times in a row is $frac 12^10approx 0.000977$. Is that what you are asking?
– lulu
Mar 27 '17 at 18:48




This is not clear. The probability of guessing wrong ten times in a row is $frac 12^10approx 0.000977$. Is that what you are asking?
– lulu
Mar 27 '17 at 18:48












@Shanye2020 That's exactly what I mean. Thanks!
– DamiToma
Mar 27 '17 at 18:50




@Shanye2020 That's exactly what I mean. Thanks!
– DamiToma
Mar 27 '17 at 18:50












@lulu Yes I'm asking that. Sorry for my english, I'm italiano. Thanks!
– DamiToma
Mar 27 '17 at 18:50




@lulu Yes I'm asking that. Sorry for my english, I'm italiano. Thanks!
– DamiToma
Mar 27 '17 at 18:50










1 Answer
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The probability to guess wrong 10 out of 10 when every single event has a 50 % prob is 100 ÷ (2×2×2×2×2×2×2×2×2×2)= 0.09765625. Not 0,000977
But if you place a bett independently one after the other then the stats are higher. If the first event is lets say black the next event has the same probability to be black 50%. So so for 10 wrong guess is 0.097 % for 9 wrong is 100÷(2×2×2×2×2×2×2×2×2)=0.1953125
When you are at the last pickk after you where wrong 9 times you have 50-50 % chance. Sorry for my bad english






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    1 Answer
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    The probability to guess wrong 10 out of 10 when every single event has a 50 % prob is 100 ÷ (2×2×2×2×2×2×2×2×2×2)= 0.09765625. Not 0,000977
    But if you place a bett independently one after the other then the stats are higher. If the first event is lets say black the next event has the same probability to be black 50%. So so for 10 wrong guess is 0.097 % for 9 wrong is 100÷(2×2×2×2×2×2×2×2×2)=0.1953125
    When you are at the last pickk after you where wrong 9 times you have 50-50 % chance. Sorry for my bad english






    share|cite|improve this answer
























      up vote
      0
      down vote













      The probability to guess wrong 10 out of 10 when every single event has a 50 % prob is 100 ÷ (2×2×2×2×2×2×2×2×2×2)= 0.09765625. Not 0,000977
      But if you place a bett independently one after the other then the stats are higher. If the first event is lets say black the next event has the same probability to be black 50%. So so for 10 wrong guess is 0.097 % for 9 wrong is 100÷(2×2×2×2×2×2×2×2×2)=0.1953125
      When you are at the last pickk after you where wrong 9 times you have 50-50 % chance. Sorry for my bad english






      share|cite|improve this answer






















        up vote
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        up vote
        0
        down vote









        The probability to guess wrong 10 out of 10 when every single event has a 50 % prob is 100 ÷ (2×2×2×2×2×2×2×2×2×2)= 0.09765625. Not 0,000977
        But if you place a bett independently one after the other then the stats are higher. If the first event is lets say black the next event has the same probability to be black 50%. So so for 10 wrong guess is 0.097 % for 9 wrong is 100÷(2×2×2×2×2×2×2×2×2)=0.1953125
        When you are at the last pickk after you where wrong 9 times you have 50-50 % chance. Sorry for my bad english






        share|cite|improve this answer












        The probability to guess wrong 10 out of 10 when every single event has a 50 % prob is 100 ÷ (2×2×2×2×2×2×2×2×2×2)= 0.09765625. Not 0,000977
        But if you place a bett independently one after the other then the stats are higher. If the first event is lets say black the next event has the same probability to be black 50%. So so for 10 wrong guess is 0.097 % for 9 wrong is 100÷(2×2×2×2×2×2×2×2×2)=0.1953125
        When you are at the last pickk after you where wrong 9 times you have 50-50 % chance. Sorry for my bad english







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        share|cite|improve this answer



        share|cite|improve this answer










        answered Aug 21 at 9:22









        eftimie budescu

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