我有啲懷疑老師唔識英文

有錯

原來你都睇得明既
咁都好啲

分子係1+2
分母係1+2+3+6

點樣係1/3

2個選擇over4個選擇

所以我咪話你錯囉on9

因為有可能兩個都叫阿joe

你個1/4已經係搞笑啦
自己加啲設定入去就當係

Statistics is intimately linked to probability theory. You can use statistics to work out the probability, the chance, that a certain event will occur: if you want to know the chance that your holiday plane will crash, you think of how many planes usually crash within a year. Since this number is very small, you deduce that the chance of your plane crashing is small also. You’ve done a very simple statistical analysis of the data concerning plane crashes and used it to work out a probability.

1/3果d就係咁覺得

3/4 除咗 兩個都係阿joe之外 應該無其他原因解釋到

#602

重點係第一幅圖嘅2同3唔使分兩條路走，所以去第二幅圖嘅時候，唔使分做1/8

一樣係8個選擇入面，有啲選擇係1/8，有啲選擇係1/4，真係大開眼界，香港數學點解教到咁

1同6要分兩條隊行，2同3就唔洗。

果8個情況有冇數漏或數多?如果有，請指出

真，教到你咁樣真係唔讀好過讀

你就係無讀先唔係我咁樣，所以先咁弱智

人地講野至少有帶觀點
你講野就帶G點

屌，原來你兩幅圖probability 溝埋嚟計，真係痴撚線
圖1還圖1，圖2還圖2，兩幅圖probability 唔同哂

咁係因為樓主given咗joe係仔

所以咪話如果係你嘅諗法就係outcome 1(the elder is boy)
但其實個老師想考outcome 2(at least 1 is boy)

咁係佢發爛炸在先

性別有無限種
所以係1除無限=0

You learnt that he has a son, Joe. What is the probability that Joe’s sibling is a brother

點撚樣老師想考outcome 2(at least 1 is boy)

一個已知係仔，求另一個都係仔，仔加仔係兩個仔，唔係at least一個仔

我屌鳩你係因為你弱智

因為個外國網條題目同樓主果條係男女調轉啊……
你可唔可以睇下條題目先答人呀

我嘅意思咪就係joe is a boy呢句野=
at least 1 is boy囉……
你做乜9呀……

joe is a boy呢句野的確= at least 1 is boy

但佢係問What is the probability that Joe’s sibling is a brother

你睇唔睇到第二句呀

咁你即係認你畫錯咗啦
咁簡單都畫錯，重讀啦