I can’t see or read the results of the survey, so I can’t answer this question. If I did, I could answer this with you! Do you have the results of it, or can you say it!
There are 10 odd numbers: {1, 3, 5, 7, 9, 11, 13, 15, 17, 19} There are 4 factors of 8: {1, 2, 4, 8} There is 1 number in both lists: {1} Probability of an odd or a factor of 8 = (10 + 4 - 1)/20 = 13/20
