An ordinary (fair) coin is tossed 3 times. outcomes are thus triples of "heads" () and "tails" () which we write , , etc. for each outcome, let be the random variable counting the number of heads in each outcome. for example, if the outcome is , then . suppose that the random variable is defined in terms of as follows: . the values of are thus: outcome value of calculate the probability distribution function of , i. e. the function . first, fill in the first row with the values of . then fill in the appropriate probabilities in the second row.