1.If a die is thrown 3 times, what is the probability that all throws show 6? 2.If a coin is tossed 100 times, find the theoretical standard deviation.
1.If a die is thrown 3 times, what is the probability that all throws show 6? 一个骰子掷了3次,每次都是6的几率多大? 答:1/6的3次方,即1/216 First the 216th. 2.If a coin is tossed 100 times, find the theoretical standard deviation. 一个硬币扔100次,理论上的标准差是? sorry,忘了怎么算了……