A) 1
B) 2
C) 3
D) 5
Correct Answer: C
Solution :
Lines are concurrent, if \[\left| \,\begin{matrix} {{a}_{1}} & {{b}_{1}} & {{c}_{1}} \\ {{a}_{2}} & {{b}_{2}} & {{c}_{2}} \\ {{a}_{3}} & {{b}_{3}} & {{c}_{3}} \\ \end{matrix} \right|=0\] Þ \[\left| \,\,\begin{matrix} 1 & 0 & \,\,q \\ 0 & 1 & -2\, \\ 3 & 2 & \,\,5 \\ \end{matrix} \right|\,=\,0\] Þ \[1\,(5+4)-0+q\,(0-3)=0\] Þ \[9-3q=0\] Þ \[q=3.\]
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