Two dice are thrown simultaneously. Let A be the event of getting sum less than 4 and B be the event of getting sum not more than 4. Find set “A or B”.(a) {(1,1), (1,2), (2,1)}(b) {}(c) {(1,1), (1,2), (1,3), (2,1), (2,2), (3,1)}(d) {(1,3), (2,2), (3,1)}I have been asked this question in final exam.The doubt is from Probability in portion Probability of Mathematics – Class 11

Two dice are thrown simultaneously. Let A be the event of getting sum

1.	Two dice are thrown simultaneously. Let A be the event of getting sum less than 4 and B be the event of getting sum not more than 4. Find set “A or B”.(a) {(1,1), (1,2), (2,1)}(b) {}(c) {(1,1), (1,2), (1,3), (2,1), (2,2), (3,1)}(d) {(1,3), (2,2), (3,1)}I have been asked this question in final exam.The doubt is from Probability in portion Probability of Mathematics – Class 11
Answer» The correct ANSWER is (c) {(1,1), (1,2), (1,3), (2,1), (2,2), (3,1)} The BEST explanation: A = {(1,1), (1,2), (2,1)} B= {(1,1), (1,2), (1,3), (2,1), (2,2), (3,1)} “A or B” CONTAINS elements of either A or B or both. So, A or B = {(1,1), (1,2), (1,3), (2,1), (2,2), (3,1)}.

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