On Saturday morning, Malachi will begin
a camping vacation and he will return home at the end of the first day on which
it rains. If on the first three days of
the vacation the probability of rain on each day is 0.2, what is the probability
that Malachi will return home at the end of the day on the following
Monday?
A. 0.008
B. 0.128
C. 0.488
D. 0.512
E. 0.640
答案是C....
根本不知道怎么做的。。。
请各位帮忙解释一下～～～拜谢～～～ | 
