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    I'm struggling with the attached question, for the first part all I can think to do is

    P1= N(1-a)(1-b)+a

    So add the probability that they both miss in succession and then add the probability that A hits B at the end. But this is not what the answer is unfortunately, can someone please tell me how to do this question thanks!
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    (Original post by Davelittle)
    ...
    You seem to understand the condition required for A to win but your probability is, as you've pointed out, wrong.

    Consider the probabilities for n=0,1,2,... where n is the number of successive misses. Hopefully, you'll be able to construct a correct probability from that.
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    This is A level question? Made me think a bit funnily enough, even though the answer is not difficult.
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    (Original post by hassassin04)
    This is A level question? Made me think a bit funnily enough, even though the answer is not difficult.
    No it's from a university level example sheet but this term we are just reviewing A level and allowing people who haven't done stats (me) and further maths (me again) at A level to catch up so everyone is in the same boat!
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    Well, you need to sum up all probabilities that make the duellist A win.. try to list those cases and associated probabilities where he wins.
 
 
 
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