【正确答案】

【答案解析】P{XY+1＞X+Y}=P{(X-1)(Y-1)＞0} =P{X＞1，Y＞1}+P{X＜1，Y＜1} =P{X＞1}P{Y＞1)+P{X＜1}P{Y＜1} =(P{X=2}+P{X=3})+P{X=0}