If A = 131 Â± 4 and B = 106 Â± 4, the percentage range of doubt in A - B is

Electronics and Communication Engineering (ECE) : Measurements and Instrumentation - Quiz(MCQ)

16%

32%

Correct Answer : Option (D) : 32%

Explanation : (A - B) = 25 ± 8. Therefore, % range of doubt = 8/25 x 100 =32%

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