Hello, Voydangel!

With onlyOk, so say we have a magic coin.

The coin has a 30% chance to land Heads up, a 30% chance to land Tails up,

and a 40% chance to land on its Edge.

If you flip the coin twice:

(a) what is the probability that you get heads at least once?

(b) what is the probability that you get heads both times?flips, we don't need any fancy formulas . . .two

We have: .

(a) The opposite of "at least one Head" is "no Heads".

. . .

Therefore: .

(b)