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Question 9Asked in BPSC TRE 1.0 (2023) General Studies Class 1-5 (2nd Sitting)

The value of x satisfying the equations 1/x + 1/y = 8, 1/y + 1/z = 12, 1/z + 1/x = 10 isसमीकरणों 1/x + 1/y = 8, 1/y + 1/z = 12, 1/z + 1/x = 10 को सन्तुष्ट करने वाले x का मान है

समीकरणों 1/x + 1/y = 8, 1/y + 1/z = 12, 1/z + 1/x = 10 को सन्तुष्ट करने वाले x का मान है
  1. A33
  2. B1/31/3
  3. C3 1/33 1/3
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
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Correct answer: (B) 1/31/3

Explanation

Adding the three equations gives 2(1/x + 1/y + 1/z) = 30, so the sum is 15. Then 1/x = 15 − 12 = 3, so x = 1/3.तीनों समीकरण जोड़ने पर 2(1/x + 1/y + 1/z) = 30, अतः योग 15 है। तब 1/x = 15 − 12 = 3, इसलिए x = 1/3।

From BPSC TRE 1.0 (2023) General Studies Class 1-5 (2nd Sitting) — Previous Year Paper

This is question 9 of BPSC TRE 1.0 (2023) General Studies Class 1-5 (2nd Sitting) — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.