A) 1.4
B) 1.5
C) 1.6
D) 1.7
Correct Answer: D
Solution :
\[{{n}_{A}}={{n}_{B}}+{{n}_{C}}\] \[{{\mu }_{A}}{{d}_{A}}\,=\,{{\mu }_{B}}{{d}_{B}}+{{\mu }_{C}}{{d}_{C}}\] \[1.5\,(3x)=(x)\,\,+\,\,1.4\,(2x)\] \[4.5\,\,=\,\,{{\mu }_{B}}\,\,+\,\,2.8\] \[{{\mu }_{B}}=4.5-2.8\text{ }=1.7\]
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