{"id":152821,"date":"2023-07-27T13:12:16","date_gmt":"2023-07-27T07:42:16","guid":{"rendered":"https:\/\/www.gkseries.com\/blog\/?p=152821"},"modified":"2023-07-27T13:12:18","modified_gmt":"2023-07-27T07:42:18","slug":"average-age-of-a-group-of-30-boys-is-16-years-a-boy-of-age-19-leaves-the-group-and-a-new-boy-joins-the-group-if-the-new-average-age-of-the-group-is-15-8-years-find-the-age-of-the-new-boy","status":"publish","type":"post","link":"https:\/\/www.gkseries.com\/blog\/average-age-of-a-group-of-30-boys-is-16-years-a-boy-of-age-19-leaves-the-group-and-a-new-boy-joins-the-group-if-the-new-average-age-of-the-group-is-15-8-years-find-the-age-of-the-new-boy\/","title":{"rendered":"Average age of a group of 30 boys is 16 years. A boy of age 19 leaves the group and a new boy joins the group. If the new average age of the group is 15.8 years, find the age of the new boy."},"content":{"rendered":"\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Question<\/td><td colspan=\"2\">Average age of a group of 30 boys is 16 years. A boy of age 19 leaves the group and a new boy joins the group. If the new average age of the group is 15.8 years, find the age of the new boy.<\/td><\/tr><tr><td>Type<\/td><td colspan=\"2\">multiple_choice<\/td><\/tr><tr><td>Option<\/td><td>12 years<\/td><td>incorrect<\/td><\/tr><tr><td>Option<\/td><td>13 years<\/td><td>correct<\/td><\/tr><tr><td>Option<\/td><td>14 years<\/td><td>incorrect<\/td><\/tr><tr><td>Option<\/td><td>15 years<\/td><td>incorrect<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Solution :- Let the age of new boy = X years<br>Total age of 30 boys = 30*16 = 480 years<br>As per question, if we minus age of boy who leaves the group and then add the age of boy who joins the group the new average becomes = 15.8 years.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.gkseries.com\/blog\/wp-content\/uploads\/2023\/07\/image-86.png\" alt=\"\" class=\"wp-image-152822\" width=\"93\" height=\"33\"\/><\/figure>\n\n\n\n<p>=15.8<\/p>\n\n\n\n<p>480 &#8211; 19 + X = 474<\/p>\n\n\n\n<p>X = 474 &#8211; 480 +19<\/p>\n\n\n\n<p>X = &#8211; 6 +19<\/p>\n\n\n\n<p> = 13 years<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Question Average age of a group of 30 boys is 16 years. A boy of age 19 leaves the group and a new boy joins the group. If the new average age of the group is 15.8 years, find the age of the new boy. Type multiple_choice Option 12 years incorrect Option 13 years correct [&hellip;]<\/p>\n","protected":false},"author":984,"featured_media":152824,"comment_status":"open","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-4)","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-4)","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-4)","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":[5138],"tags":[],"class_list":["post-152821","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-quantitative-aptitude"],"_links":{"self":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/152821","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/users\/984"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/comments?post=152821"}],"version-history":[{"count":1,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/152821\/revisions"}],"predecessor-version":[{"id":152825,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/152821\/revisions\/152825"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/media\/152824"}],"wp:attachment":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/media?parent=152821"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/categories?post=152821"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/tags?post=152821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}