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geometric series ...
tomas suppose in his first chance itself A gets a head,he wins so there probability is 1/2 ....
no... what if he don't?
then, we multiply or add?
s it like x+x^2+x^3+...+x^n?
1/2+1/2*1/2*1/2+1/2*1/2*1/2*1/2*1/2+... H TTH TTTTH ...
tomas u can also
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
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
hey that is confusing
opps, thanks Tomas
yes, these are very tough questions ...
which book will help?or any approach?
do you have a textbook?
did you notice geometric series in this problem? do you know how to use them?
ya,nagar and das....nd hammond
u may explain the g.p also
some good videos on Khan Academy http://www.khanacademy.org/#browse
i think he don't even understand what we said?
Here is a video on the second question that you asked today http://www.khanacademy.org/video/expected-value--e-x?playlist=Probability
Here is a video on the first question from today http://www.khanacademy.org/video/compound-probability-of-independent-events?playlist=Probability
tomas u can help i guess