CBSE Class 10 Sample Paper for 2022 Boards - Maths Standard [MCQ]

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Question 24 - CBSE Class 10 Sample Paper for 2022 Boards - Maths Standard [MCQ] - Solutions of Sample Papers for Class 10 Boards

Last updated at April 16, 2024 by

If 217x + 131y = 913, 131x + 217y = 827, then x + y is

(a) 5   (b) 6   (c) 7   (d) 8

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Question 24 If 217𝑥 + 131𝑦 = 913, 131𝑥 + 217𝑦 = 827, then 𝑥 + 𝑦 is (a) 5 (b) 6 (c) 7 (d) 8Given equations 217𝑥 + 131𝑦 = 913 …(1) 131𝑥 + 217𝑦 = 827 …(2) Adding both equations (1) and (2) (217𝒙 + 131𝒚) + (131𝒙 + 217𝒚) = 913 + 827 (217𝑥 + 131𝑥) + (131𝑦 + 217𝑦) = 1740 348𝑥 + 348𝑦 = 1740 348 (𝒙 + 𝒚) = 1740 𝑥 + 𝑦 = 1740/348 𝑥 + 𝑦 = 5 So, the correct answer is (a)

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo