GWD MATH1 Q2

chenzhexi

大家帮忙看看 这题是不是应该是1/3

Q2:

A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?



A.0

B.1/9

C.2/9

D.1/3

E.1

Alexwangchao

第一次坐哪里无所谓 1
第二次只要坐在和第一次不同的座位就可 2/3
第三次要坐在前两次都没有坐过的座位才行 1/3

答案 = 1*2/3*1/3 = 2/9

lestatwm

(3X2X1)/(3X3X3)

zincgirl

谢谢谢谢