Acoin is biased such that it results in 2 heads out of every 3 coin flips, on average. which statement is true? a.)the theoretical probability of getting heads from an unbiased coin is about 66%. b.)the sequence hthtthttt is valid for the biased coin c.)the biased coin has about a 33% probability of displaying tails. d.)the sequence htthththt is valid for the biased coin.