First slide

Accuracy; precision of instruments and errors in measurements

Question

Three measurements are, $a = 25.6, b = 21.1 a n d c = 2.43$ . Find the value $a - b - c$ to correct significant figures.

Easy

A

2.0
B

2.1
C

3.0
D

3.1

Solution

a-b-c = 25.6-21.1-2.43
= 2.07 = 2.1

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