Question
Given that a,b and c are positive real numbers, such that a+b+c= x, then which of the following is true?
Answer: Option D
:
D
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D
option (d)
Assumption of values is the easiest way to solve. a=b=c=1 and x=3.
Take a=1, b=2 and c=3. x=6. all 3 still hold good. Answer option d.
Note: with answer options like “all of these” and “none of these” you need to be a bit careful. Do not mark the answer based on only one set of values. Take two cases and see which options fit in BOTH the cases.
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