(01 Nov 2020) – Mathematical Reasoning, 1st & 2nd Shift NTA UGC NET JRF Question paper, Answer key

1. The sum of the squares of three numbers is 83, while the sum of their products taken two at a time is 71. Their sum will be: 1. 15 2. 142 3. 49 4. 225 SHOW ANSWER   Answer 1 Explanation: (a + b + c)² = a² + b² + c² + 2(ab …

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