The 
matrix of a 100 bus
interconnected system is 90% sparse. Hence the number of transmission lines in
the system must be :
450
500
900
1000
450
Number of Transmission line can be given as :
where
n = Number of buses
= sparse
Given that,
n = 100
= 90% =9
Hence transmission lines,
Hence, the correct option is
(A).
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