A) \[\pm 7%\]
B) \[\pm 5%\]
C) \[\pm 9%\]
D) \[\pm 8%\]
Correct Answer: A
Solution :
\[\frac{\Delta P}{P}=\pm \left[ \frac{1}{2}\frac{\Delta a}{a}+\frac{1}{2}\frac{\Delta b}{b}+\frac{1}{2}\frac{\Delta C}{c}+\frac{\Delta d}{d} \right]\] \[\Rightarrow \,\,\frac{\Delta P}{P}\times 100=\pm \left[ \frac{1}{2}\times 2%+\frac{1}{2}2%+\frac{1}{2}2%+4% \right]\] \[=\pm [1%+1%+1%+4%]=\pm 7%\]
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