PP-T1-193

[max999]

A basket contains 5 apples, of which 1 is spoiled and the rest are good. If Henry is to select 2 apples from the basket simultaneously and at random, what is the probability that the 2 apples selected will include the spoiled apple?
Ans:式子怎麼列阿

[amyliang]

?？？？請問你的答案是　”式子怎麼列啊”　嗎
還是　，你的答案打不出來咧
我猜答案是2/5 不知道對了沒?
5個裡 有1個壞的4個好的
要拿2個出來，所以]C1,1*C4,1]/C5,2