When in Step 1, the equation is multiplied by two, the second term, -9x, is not doubled as well. Thus the answer above for Part B, is what Step 1 should look like.
P(Greece) =0.28 among tem P(G∩I) = 0.11. We also know tat P(G ∪ I ) =1 [either Greece or Italy or both= all travelers) The only data that is missing is te P(Italy) P(G ∪ I ) = P(G) + P(I) - P(G∩ I) 1 =0.28 + P(I) so P(I) = 0.72 P(G) = 0.28 (including the 0 .11) P(I) = 0.72 (including the 0.11) P(G and I) =0.11