
1、设甲x只,则乙2000-x只2x+3(2000-x)<=4700-x<=-1300∴x>=1300 ∴至少要1300只 2、设甲x只,则乙2000-x只94%x+99%(2000-x)>=96%×200094x+198000-99x>=192000-5x>=-6000x<=1200∴最多为1200只

1、设甲x只,则乙2000-x只2x+3(2000-x)<=4700-x<=-1300∴x>=1300 ∴至少要1300只 2、设甲x只,则乙2000-x只94%x+99%(2000-x)>=96%×200094x+198000-99x>=192000-5x>=-6000x<=1200∴最多为1200只