一條好簡易的數!!(probability)

2007-12-31 11:38 am

When three coins are thrown, what is the probability of getting at least tree head?
ans:1/2x1/2x1/2
定係:1/2x1/2x1/2x3

答案洗唔洗x3 o架??

回答 (2)

Mercury

2007-12-31 11:48 am

✔ 最佳答案

1/2 x 1/2 x 1/2
because for each coin, there is only one throw for it.

coin1
- head 1/2
- tail 1/2

coin2
- head 1/2
- tail 1/2

coin3
- head 1/2
- tail 1/2

for head, it would be (1/2 x 3)

ans: 1/2 x 1/2 x 1/2
^^

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curtis

2007-12-31 5:27 pm

洗唔洗洗唔洗洗唔洗洗唔洗洗唔洗洗唔洗洗唔洗洗唔洗洗唔洗洗唔洗

參考: 洗唔洗

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