[問題]天山 09-02 <-yuying改標題, 請見諒

[mark-alan]

Q2 On Saturday morning, Malachi will begin a camping vacation and he will return home atthe end of the first day on which it rains. If on the first three days of the vacation theprobability of rain on each day is 0.2, what is the probability that Malachi will returnhome 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

這到底是怎麼算?

[汪汪北鼻]

Saturday(0.8) Sunday(0.8) Monday(0.2)= 0.8*0.8*0.2=0.128

[mark-alan]

我覺得我像白痴.......

[BECKY]

me too...
如果題目是中文就好了...

[usamiyo]

"Saturday(0.8) Sunday(0.8) Monday(0.2)= 0.8*0.8*0.2=0.128 "

為何要用0.8x0.8呢? 不懂這部分從哪來的. 是指不會下雨的機率嗎? 可是題目不是問會下雨嗎?

[Ace]

what is the probability that Malachi will return home at the end of the day on the following Monday

問monday回家的機率
所以前兩天不能下雨