3 decimal places, rounded correctly, such as 0.250 or 0.367. Are news stories authentic or deceptive? Do newscasters change their tone while broadcasting the news? The contingency table gives the results of a study. a) What is probability of an authentic news story and a positive tone from the newscaster? b) If the news story is authentic, what is probability newscaster used a negative tone? d) What is the probability of a deceptive news story? e) What is the probability of the newscaster using a neutral tone? Authentic News Story Deceptive News Story Totals Negative Tone 60 110 Neutral Tone 50 60 Positive Tone 25 10 Totals