A class of 28 students has 13 boys and 15 girls. What is the ratio of girls to boys in the class? 15:28 15:13 13:15 13:28<\/p>\n\n\n\n
PREVIOUS ent performs the following estimations. 24 + 190 = 210 151 +319=470 974 + 1,022 = 1,990 Based on these estimations, which of the following is the student’s estimate of 452 +5,017? 5,470 5,500 5,450 5,400<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n Correct Answer: 15:13<\/strong><\/p>\n\n\n\n Explanation:<\/strong><\/p>\n\n\n\n A ratio is a comparison between two quantities. In this case, the problem asks for the ratio of girls to boys<\/strong>, meaning we are comparing the number of girls first<\/strong> to the number of boys second<\/strong>.<\/p>\n\n\n\n From the problem:<\/p>\n\n\n\n So the ratio of girls to boys is: This is a part-to-part<\/strong> comparison because it compares two parts of the whole (girls and boys). If the question had asked for the ratio of girls to the total number of students, that would be a part-to-whole<\/strong> ratio (15:28). But since it specifically asks for girls to boys<\/strong>, the correct answer is:<\/p>\n\n\n\n 15:13<\/strong><\/p>\n\n\n\n Based on these, what is the best estimate for 452 + 5,017<\/strong>?<\/p>\n\n\n\n Correct Answer: 5,500<\/strong><\/p>\n\n\n\n Explanation:<\/strong><\/p>\n\n\n\n Estimation in addition typically involves rounding numbers<\/strong> to the nearest ten, hundred, or thousand depending on the numbers involved. Let’s analyze the student\u2019s pattern:<\/p>\n\n\n\n So the student consistently uses rounding to the nearest 10, 50, or 100<\/strong>, often rounding slightly down<\/strong>.<\/p>\n\n\n\n Now apply this to 452 + 5,017<\/strong>:<\/p>\n\n\n\n \u2192 500 + 5,000 = 5,500<\/strong><\/p>\n\n\n\n This fits with the student\u2019s previous estimation style.<\/p>\n\n\n\n Therefore, the best estimate the student would give is:<\/p>\n\n\n\n 5,500<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":" A class of 28 students has 13 boys and 15 girls. What is the ratio of girls to boys in the class? 15:28 15:13 13:15 13:28 PREVIOUS ent performs the following estimations. 24 + 190 = 210 151 +319=470 974 + 1,022 = 1,990 Based on these estimations, which of the following is the student’s […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-216074","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/216074","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=216074"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/216074\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=216074"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=216074"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=216074"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Question 1: A class of 28 students has 13 boys and 15 girls. What is the ratio of girls to boys in the class?<\/strong><\/h3>\n\n\n\n
\n
15:13<\/strong><\/p>\n\n\n\n
\n\n\n\nQuestion 2: A student performs the following estimations:<\/strong><\/h3>\n\n\n\n
\n
\n
\u2192 Rounded 24 to 20<\/strong> and 190 to 190<\/strong> \u2192 20 + 190 = 210<\/strong><\/li>\n\n\n\n
\u2192 Rounded 151 to 150<\/strong> and 319 to 320<\/strong> \u2192 150 + 320 = 470<\/strong><\/li>\n\n\n\n
\u2192 Rounded 974 to 1,000<\/strong> and 1,022 to 1,000<\/strong> \u2192 1,000 + 1,000 = 2,000<\/strong>, but the student estimated slightly under at 1,990<\/strong>, possibly for simplicity.<\/li>\n<\/ol>\n\n\n\n\n