A) 1.8
B) 2.2
C) 1.2
D) 2.8
Correct Answer: A
Solution :
[a] \[m=\frac{{{w}_{A}}\times 1000}{{{M}_{A}}\times {{w}_{B}}}\] \[=\frac{15\times 1000}{98\times 85}=1.8\]
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