Please discuss

please discuss

50%; one outcome is decided, and the desired result relies on one coin flip.

Let H represent heads, T - tails.

Possibile cases for described situation are:

H/T
T/H
H/H

Out of 3, only is satisfactory. Therefore, it's 1/3.

You failed to consider one inverse scenario.

phew, done, had some hard time disussing this issue with my wife, mainly because she didn't want to, but I went full alpha mode and stuff. You're welcome.

1/3
P(A|B) where B is the event a head landed (3/4 times) A is the event that both are head so (1/4)/(3/4) =1/3

Nothing to discuss.
If actions A and B are independent (effect of one flipped coin doesn't depend on other) then:
P(B|A) = P(B)
P(B) = .5 = 50%

wtf?

You failed to consider one inverse scenario. It's 1/3.

66%, it says AT LEAST ONE OF THEM is landed heads.

My bad you're right I misread