— Would you like to go to the concert with me tonight?
— I'd love to, I can't. I have a lot of homework to do.
抛掷甲、乙两颗骰子,若事件A:“甲骰子的点数大于4”;事件B:“甲、乙两骰子的点数之和等于7”,则P(B|A)的值等于 ( )
下列运算正确的是( )