{"id":247256,"date":"2025-07-07T15:29:48","date_gmt":"2025-07-07T15:29:48","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=247256"},"modified":"2025-07-07T15:29:50","modified_gmt":"2025-07-07T15:29:50","slug":"among-employees-of-a-certain-firm-80-know-java-30-know-python-and-20-know-both","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/07\/among-employees-of-a-certain-firm-80-know-java-30-know-python-and-20-know-both\/","title":{"rendered":"Among employees of a certain firm, 80% know Java, 30% know Python, and 20% know both"},"content":{"rendered":"\n<p>Among employees of a certain firm, 80% know Java, 30% know Python, and 20% know both. What proportion of programmers do not know Python? 0.90 0.80 0.14 0.70 0.20<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>To solve this problem, we need to find the proportion of employees who do not know Python.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Understand the given information<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>80%<\/strong> know Java<\/li>\n\n\n\n<li><strong>30%<\/strong> know Python<\/li>\n\n\n\n<li><strong>20%<\/strong> know both Java and Python<\/li>\n<\/ul>\n\n\n\n<p>We need to determine how many employees <strong>do not<\/strong> know Python. This involves finding the complement of the percentage of employees who know Python.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Break down the groups<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Employees who know both Java and Python<\/strong> = 20% (this group is already included in the 80% who know Java and the 30% who know Python)<\/li>\n\n\n\n<li><strong>Employees who know only Python<\/strong> = Total Python knowledge minus those who know both:<br>30% &#8211; 20% = 10%<\/li>\n\n\n\n<li><strong>Employees who know only Java<\/strong> = Total Java knowledge minus those who know both:<br>80% &#8211; 20% = 60%<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Determine the proportion of employees who do not know Python<\/h3>\n\n\n\n<p>The total percentage of employees who know Python is 30%, which includes those who know both Java and Python (20%) and those who know only Python (10%).<\/p>\n\n\n\n<p>Therefore, the proportion of employees who do <strong>not<\/strong> know Python is the complement of those who know Python.<\/p>\n\n\n\n<p>This can be calculated as: 1\u2212Proportion&nbsp;who&nbsp;know&nbsp;Python=1\u22120.30=0.701 &#8211; \\text{Proportion who know Python} = 1 &#8211; 0.30 = 0.70<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 4: Conclusion<\/h3>\n\n\n\n<p>The correct answer is <strong>0.70<\/strong>, meaning 70% of employees do not know Python.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Final Answer:<\/h3>\n\n\n\n<p>The proportion of employees who do not know Python is <strong>0.70<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Among employees of a certain firm, 80% know Java, 30% know Python, and 20% know both. What proportion of programmers do not know Python? 0.90 0.80 0.14 0.70 0.20 The correct answer and explanation is: To solve this problem, we need to find the proportion of employees who do not know Python. Step 1: Understand [&hellip;]<\/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-247256","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/247256","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=247256"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/247256\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=247256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=247256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=247256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}