SOLUTION: Motor Vehicle Accidents During a recent year, there were 15.4 million automobile accidents, 6.9 million truck accidents, and 171,000 motorcycle accidents. Find the following probab

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Question 1207331: Motor Vehicle Accidents During a recent year, there were 15.4 million automobile accidents, 6.9 million truck accidents, and 171,000 motorcycle accidents. Find the following probabilities. Enter your answers as fractions or decimals rounded to decimal places.
Part 1 of 2
(a) If one accident is selected at random, find the probability that it is either a truck or motorcycle accident.
Part 2 of 2
(b) If one accident is selected at random, find the probability that it is not a truck accident.

Answer by greenestamps(13200)   (Show Source): You can put this solution on YOUR website!


Use the basic definition of probability and use a calculator to find the answers.
                            # of truck and motorcycle accidents     6.9 million + 171,000
  P(truck or motorcycle) = ------------------------------------- = --------------------------------------
                                  total # of accidents              15.4 million + 6.9 million + 171,000

                                                15.4 million + 171,000
  P(not truck) = P(automobile or motorcycle) = --------------------------------------
                                                15.4 million + 6.9 million + 171,000
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