{"id":21733,"date":"2026-05-25T22:57:24","date_gmt":"2026-05-25T16:57:24","guid":{"rendered":"https:\/\/mcqacademy.com\/en\/mcq\/probability-of-not-choosing-a-yellow-button\/"},"modified":"2026-05-25T22:57:24","modified_gmt":"2026-05-25T16:57:24","slug":"probability-of-not-choosing-a-yellow-button","status":"publish","type":"mcq","link":"https:\/\/mcqacademy.com\/en\/mcq\/probability-of-not-choosing-a-yellow-button\/","title":{"rendered":"Probability of not choosing a yellow button"},"content":{"rendered":"\n<p>There are 10 red buttons and 9 yellow buttons in a bag. One button is selected at random. What is the probability of NOT selecting a yellow button?<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>10 red buttons<\/li><li>9 yellow buttons<\/li><\/ul>\n\n\n\n<p>Choose the best answer.<\/p>\n<ul class=\"quiz-options\"><li>19\/10<\/li><li>5\/9<\/li><li>52.6%<\/li><li>9\/19<\/li><li>10\/19<\/li><\/ul>","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","topic":[2907,2909],"subject":[2748],"education_level":[1894],"class_list":["post-21733","mcq","type-mcq","status-publish","hentry","topic-basic-probability","topic-complement-probability","subject-probability-statistics","education_level-grade-8"],"mcq_note":"<p>For a \u201cnot\u201d event, count the outcomes outside the named event. This is the complement of the event.<\/p><ul><li>The complement of selecting yellow is selecting any other color.<\/li><li>There are 10 non-yellow buttons out of 19 total buttons.<\/li><li>So the probability is 10\/19 = 10\/19.<\/li><li>A complement probability can also be found by doing 1 minus the probability of the event.<\/li><\/ul><p>The correct answer is 10\/19. This matches the calculation or definition, so students should focus on the reasoning rather than only memorizing the final value.<\/p>","mcq_options":[{"right":"no","answer":"19\/10"},{"right":"no","answer":"5\/9"},{"right":"no","answer":"52.6%"},{"right":"no","answer":"9\/19"},{"right":"yes","answer":"10\/19"}],"multi_answers":"no","subject_terms":[{"id":2748,"title":"Probability &amp; Statistics","slug":"probability-statistics"}],"topic_terms":[{"id":2907,"title":"Basic Probability","slug":"basic-probability"},{"id":2909,"title":"Complement Probability","slug":"complement-probability"}],"_links":{"self":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq\/21733","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq"}],"about":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/types\/mcq"}],"author":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/users\/39"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/comments?post=21733"}],"wp:attachment":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/media?parent=21733"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/topic?post=21733"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/subject?post=21733"},{"taxonomy":"education_level","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/education_level?post=21733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}