A) 2
B) 3
C) 4
D) 8
Correct Answer: C
Solution :
Given, \[\frac{2}{x}+\frac{3}{y}=\frac{9}{xy}\] \[\Rightarrow \] \[2y+3x=9\] ...(i) and \[\frac{4}{x}+\frac{9}{y}=\frac{21}{xy}\]\[\Rightarrow \]\[4y+9x=21\] ...(ii) On solving Eqs. (i) and (ii),we get \[x=1\]and \[y=3\] \[\therefore \] \[x+y=1+3=4\]You need to login to perform this action.
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