13.9 This is chance Strategy and choice problem . These are the all information that I have

13.9 The bicameral U.S. Congress is a yes-no voting system with voters of two types: The House of Representatives has 435 members, C....C435. The Senate has 101 members, S1.....SoI (including the vice president, counted here as Sign). A measure passes the Congress if it receives a simple majority of votes in both the House and the Senate. Prove that the bicameral U.S. Congress is not trade robust and so not a weighted voting system