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Q.

The diameter of a spherical bob, when measured with vernier calipers yielded the following values : 3.33 cm, 3.32 cm, 3.34 cm, 3.33 cm and 3.32 cm. The mean diameter to appropriate significant figures is :

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a

3.3 cm

b

3.33 cm

c

3.32 cm

d

3.328 cm

answer is C.

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Detailed Solution

From the given values, mean diameter is $\frac{3.33 + 3.32 + 3.33 + 3.34 + 3.32}{4} = \frac{16.64}{4}$

= 3.328 = 3.33 cm. (Applying rule of significant figure)

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