Step 1 :First, calculate the total number of people in the group. This is the sum of Democratic men, Republican men, Democratic women, and Republican women, which is \(20 + 30 + 60 + 50 = 160\).
Step 2 :Next, calculate the number of people who are either a woman or a Republican. This is the sum of Republican men, Democratic women, and Republican women, which is \(30 + 60 + 50 = 140\).
Step 3 :Then, calculate the probability of randomly meeting either a woman or a Republican. This is the ratio of the number of people who are either a woman or a Republican to the total number of people in the group, which is \(\frac{140}{160} = 0.875\).
Step 4 :Finally, simplify the probability to a fraction. The simplified fraction is \(\boxed{\frac{7}{8}}\).