WBJEE 2013 Math Solved Paper

An objective type test paper has 5 questions. Out of these 5 questions, 3 questions have four options each (A, B, C,D) with one option being the correct answer. The other 2 questions have two options each, namely True and False. Acandidate randomly ticks the options. Then the probability that he/she will tick the correct option in at least fourquestions, is