The options are 0.106,0.63,0.51,0.53

Call  the number of responses.



Each of those probabilities will be the frequency of occurrence of the particular event.  We get zero responses 20 out of 200 times, 1 response 30 out of 200, and 2 responses 56 out of 200 times.  So



We see we could have just said 20+30+56=106 of the 200 editorials got zero, one or two responses, so the probability is 106/200.