Here's another way of thinking about it:

You are 10 feet away from a cliff. You flip a coin, and if it's heads you move one foot away from the cliff, but if it's tails you move one foot closer.

If you fall off the cliff you lose. You flip the coin 25 times.

Find out the probability of being alive (assuming falling off the cliff kills you) at the end by doing this experiment 100, 1000, and 10000 times (each time, you start 10 feet away)

Anyway, this should work:

0->B ‘Reset variables

100->U

For(T,1,U `100 trials

10->M `Reset amount of money

For(N,1,25 `25 coin flips

M+2*randInt(0,1)-2->M `randomly either add or subtract $1

If M>25-N `If you can’t lose (money>remaining flips), end trial

25->N

If not(M `If you have no more money, end trial

26->N

End

Disp T `show how many trials are completed

B+(N-26)->B `check/record whether trial was ended from losing all money or winning.

End

Disp B/U `show probability