please helps me to solve the question 3c. The answer is 2/9 but i do not know how to get that...T_T

- Sep 14th 2009, 12:52 PMdaominhhai129Anyone here is good at Probability? I can't get the answer for this question...
please helps me to solve the question 3c. The answer is 2/9 but i do not know how to get that...T_T

- Sep 14th 2009, 01:06 PMPlato
- Sep 14th 2009, 01:12 PMdaominhhai129
thank you very much..but my answer sheets say it's 2/9....i don't know whether my answer sheet is wrong or i do wrongly...

- Sep 14th 2009, 01:20 PMPlato
- Sep 14th 2009, 01:22 PMdaominhhai129
oh haha..thank you thank you..i'm so stupid..ya..now i can understand..thanks