A) \[21\times {{10}^{3}}\pm 10%\]
B) \[23\times {{10}^{1}}\pm 10\]
C) \[21\times {{10}^{3}}\pm 5%\]
D) \[12\times {{10}^{3}}\pm 5%\]
Correct Answer: A
Solution :
Red, brown, orange, silver red and brown represents the first two significant figures.| Significant figures | Multiplier | Tolerance |
| Red Brown | Orange | Silver |
| 2 1 | 103 | ± 10% |
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