A) 28
B) 20
C) 23
D) 26
Correct Answer: C
Solution :
: Number of triangles In \[\Delta ABC=({{T}_{1}},{{T}_{2}}{{T}_{3}},{{T}_{4}}{{T}_{5}}{{T}_{6}}{{T}_{7}}{{T}_{6}}{{T}_{7}},({{T}_{1}}{{T}_{2}}{{T}_{3}}{{T}_{4}}{{T}_{5}}{{T}_{6}}{{T}_{7}}))=9\] Number of triangles in \[\Delta DEF\]excluding \[{{T}_{6}}\], \[{{T}_{7}}:({{T}_{8}},{{T}_{9}},{{T}_{10}},{{T}_{11}},{{T}_{8}}{{T}_{9}},{{T}_{10}}{{T}_{11}},{{T}_{12}}{{T}_{13}},{{T}_{12}},{{T}_{13}}\] \[{{T}_{14}},{{T}_{15}},({{T}_{6}},{{T}_{8}},{{T}_{10}},{{T}_{12}}{{T}_{14}}),({{T}_{7}}{{T}_{9}},{{T}_{11}}{{T}_{13}},{{T}_{15}}),\] \[{{T}_{6}}\,{{T}_{7}}\,{{T}_{8}}\,{{T}_{9}}\,{{T}_{10}}\,{{T}_{11}}\,{{T}_{12}}\,{{T}_{13}}\,{{T}_{14}}{{T}_{15}})=14\]You need to login to perform this action.
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