Medium
Math and Logic
Get fair toss from biased coin.
Choose an answer
A.Toss it once
B.Toss it three times
C.You can't
D.Toss twice
Answer: Toss twice
If you toss twice, the probabilities of HT and TH are both (p * (1-p)). Since these are equal, assigning one to 'Heads' and the other to 'Tails' creates a fair 50/50 result.