यदि (a<b) और (c>d) है, तो कौन सा निष्कर्ष निश्चित रूप से नहीं निकाला जा सकता?
If (a<b) and (c>d), which conclusion cannot be drawn with certainty?
Explanation opens after your attempt
Correct Answer
A. (a+c<b+d)
Concept
Inequalities in opposite directions do not give a fixed comparison between (a+c) and (b+d). Same direction is the safe rule for adding inequalities.
Why this answer is correct
The correct answer is A. (a+c<b+d). Inequalities in opposite directions do not give a fixed comparison between (a+c) and (b+d). Same direction is the safe rule for adding inequalities.
Exam Tip
विपरीत दिशा की असमानताओं को जोड़कर (a+c) और (b+d) की निश्चित तुलना नहीं मिलती। जोड़ने के लिए दिशा समान होना सुरक्षित नियम है।
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