(A) 538
(B) ** 332
(C) 270
(D) 125
EXPLANATIONS BELOW
Concept note-1: -Obama and Biden carried Colorado with 51.49% of the popular vote to Romney’s and Ryan’s 46.13%, thus winning the state’s nine electoral votes by a 5.36% margin.
Concept note-2: -Pennsylvania’s 20 electoral votes are allotted on a winner-take-all basis. Democratic incumbent President Barack Obama received 51.97% of the vote, beating Republican challenger Mitt Romney’s 46.59%.