Use the relative frequency approach to estimate the probability of the event. A polling firm, hired to estimate the likelihood of the passage of an upcoming referendum, obtained the set of survey responses to make its estimate. The encoding system for the data is: 1 = FOR, 2 = AGAINST. If the referendum were held today, estimate the probability that it would pass. 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1 Oa. 4 O b. .65 O c. .5 O d. .6 Find the indicated probability. If P(A) = 12/19, find P( A ) O a. 12/31 Ob. 0 O c. 7/19 O d. 19/12