(2 marks) Two people, one after another without replacement, were chosen randomly from the above sample of 800 patients. What is the probability that at least one of them shows symptoms or both are males?

5. A group of patients who had contracted a certain virus in City U were studied. These patients had been classified according to three different criteria: . gender . age . whether they had shown any symptoms Table 1 below summarises the number of patients in each of these categories Table 1: Number of Patients classified under age group, gender and whether symptoms had been shown Young Age Group Senior Age Group Show symptoms? Male Female Male Female Total Yes 15 13 272 140 440 No 100 72 88 100 360 Total 115 85 360 240 800