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1 The Federal Reserve System: Open Market Operations 1. Recall that C&T states MM = RR where MM is the money multiplier and RR is the reserve ratio. Given RR, A Reserves or A Money Supply find solve for the unknown. . RR = .10, A Reserves = $20, 000, and A Money Supply = $? . RR = .10, A Reserves = $?, and A Money Supply = $1, 000, 000 . RR =?, A Reserves = $550, 000, and A Money Supply = $50, 000, 000