what is the probability that there are an equal number of head and tails? (b) what is the probability the first three flips are heads? (c) what is the probability that there are an equal number of heads and tails and the first three flips are heads? (d) what is the probability that there are an equal number of heads and tails or the first three flips are heads (or both)? (e) what is the probability that the first three flips are heads given that an equal number of heads and tails are flipped? 3