I have read the entire chapter in my book and have searched the internet and I still have no idea where to even begin. HELP! 4. a.) Explain the significance of a probability of 1.0 and of a probability of 0.0. b.) Calculate the probability for an event to occur if 420 events have been recorded as successful for 1200 attempts. c.) Find the probability of throwing a "tail" if your tossing a balanced coin.