The tree diagram below shows all of the possible outcomes for flipping three coins. A tree diagram has outcomes (H, H, H), (H, H, T), (H, T, H), (H, T, T), (T, H, H), (T, H, T), (T, T, H), (T, T, T). What is the probability that at least two of the coins will be tails? StartFraction 1 over 8 EndFraction StartFraction 3 over 8 EndFraction One-half Three-fourths