At least two heads with two coins? You can't get more.
There are 4 different outcomes:
tail-tail, head-tail, tail-head and head-head.
You can use one out of four - which gives us the probability 1/4 = 0.25 = 25%
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The probability is 50-50.
1/2 or 50% (1/8 prob of 0H + 3/8 prob of 1H)
The probability is 3/4.
50%
50%