I would never have 90% confidence. The only way you can be any more "confident" is to record what was thrown before.

If i threw a tails, the chance was 0.4 = 40%

I Threw again, the chance of another tails is 0.4 x 0.4 = 16% Threfore chance of heads = 84%

I Threw again, the chance of yet another tails is 0.4 x 0.4 x 0.4 = 6.4% therefore Heads = 95.4%

You could say "statistically" the chances of a heads are improving but they are still really only 60% each time as each toss is independant of the previous tosses :smart:

I think thats right. Would've been easier to look at google instead of giving me the opportunity to waste my time! :idea: