Probability worksheet with definitions and problems on trials, events, and probability calculations.

Final Answer:
(1) A trial is a single action or experiment that can have different outcomes, like flipping a coin or rolling a die.
(2) An elementary event is one specific possible outcome, like getting “heads” when flipping a coin.
(3) An event is a set of one or more outcomes, like getting “an even number” when rolling a die.
(4) The probability of an event is how likely it is to happen, calculated as: (Number of favorable outcomes) ÷ (Total number of possible outcomes).
(5) S = {H, T}
(6) S = {HH, HT, TH, TT}
(7) S = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}
(8) 1/2
(9) 1/2
(10) 2/3
(11) 1/2
(12) 5/6
(13) 1/6
(14) 1/2
(15) 1/3
(16) 2/3