The owner of a herd of cows wants to determine the influence…
The owner of a herd of cows wants to determine the influence of the ages of his cows on the amount of calving difficulty that occurs in his herd. He constructs the following table: Age of Cow (in years) 0-2 3-5 6-10 over 10 Total No difficulty 40 35 20 5 100 Difficult birth 35 45 15 5 100 Total 75 80 35 10 200 What is the probability that a randomly selected cow either has calving difficulty or is less than 3-years-old?