A) \[\text{A}\to (s);\,B\to (r);\,C\to (p);\,D\to (q)\]
B) \[\text{A}\to (r);\,B\to (s);\,C\to (p);\,D\to (q)\]
C) \[\text{A}\to (r);\,B\to (s);\,C\to (q);\,D\to (p)\]
D) \[\text{A}\to (s);\,B\to (r);\,C\to (p);\,D\to (q)\]
Correct Answer: B
Solution :
A. \[4x-6=54\Rightarrow \,4x=60\Rightarrow \,x=15\] B. \[x-\frac{3}{4}\,x=35\Rightarrow \,\frac{x}{4}=35\Rightarrow \,x=35\times 4\] \[\therefore \,\,\] Required number \[=\frac{35\times 4}{4}=35\] C. \[\frac{x}{2}+\frac{x}{3}+\frac{x}{4}=x+12\] \[\Rightarrow \,\,\,6x+4x+13x=12(x+12)\] \[\Rightarrow \,\,13x-12x=144\] \[\Rightarrow \,\,x=144\] D. \[x=\frac{x}{5}+20\Rightarrow \,4x=100\Rightarrow \,x=25\]
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