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JEE Mains 06-Sep-2020 Shift 2 Solved Paper

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Question : 12

Total: 75

A student measuring the diameter of a pencil of circular cross-section with the help of a vernier scale records the following four readings 5.50‌mm,5.55‌mm,5.45‌mm;5.65‌mm. The average of these four readings is 5.5375‌mm and the standard deviation of the data is 0.07395‌mm. The average diameter of the pencil should therefore be recorded as :

(5.5375±0.0739)‌mm
(5.538±0.074)‌mm
(5.54±0.07)‌mm
(5.5375±0.0740)‌mm

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