1c:I[1254,["7330","static/chunks/d3ac728e-78c3d5d7a486ed3a.js","5159","static/chunks/5159-48592f0bf1a47f9d.js","8175","static/chunks/8175-f84d59b9bd013e10.js","8167","static/chunks/8167-b25693a0140130f2.js","664","static/chunks/664-bceb0f356f9312eb.js","3703","static/chunks/app/practice-question/%5Bslug%5D/page-d1408559b663b83f.js"],"PracticeQuestionCard"] 1b:T4d4,{"@context":"https://schema.org","@type":"QAPage","name":"If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21s…","url":"https://vidyalelo.com/practice-question/if-18th-and-11th-term-of-an-ap-are-in-the-ratio-3-2-then-its-21st-and-5th-terms-are-in-the-ratio-104521","keywords":"practice questions, MCQ, MCQs with answers, objective questions, competitive exam questions, Competitive Exams, Competitive Exams MCQ, Competitive Exams MCQs, Competitive Exams questions, Competitive Exams practice questions, Aptitude, Aptitude MCQ, Aptitude MCQs, Aptitude questions, Aptitude practice questions, Progressions","mainEntity":{"@type":"Question","name":"If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21s…","text":"If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21st and 5th terms are in the ratio","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Option B. 3 : 1. Answer & Solution Answer: Option B Solution: & 18^ th\\, term:11^ th\\, term = 3:2 & a_18a_11 = 3/2 & a + 17da + 10d = 3/2 & 2a + 34d = 3a + 30d & 34d - 30d = 3a - 2a & a = 4d & Now, & a_21a_5 = a + 20da + 4d & \\,\\,\\,\\,\\,\\,\\,\\,\\,\\,\\, = 4d + 20d4d + 4d & \\,\\,\\,\\,\\,\\,\\,\\,\\,\\,\\, = 24…"}}}1d:T442,

Answer & Solution

Answer: Option B

Solution:

$$\eqalign{ & {18^{{\text{th}}}}\,{\text{term}}:{11^{{\text{th}}}}\,{\text{term}