find the probablitiy of getting the same results in the first throw and the yhird throw
THXXXXXXX
更新1:
yhird=third i correct it
a fair coin is thrown 4times
2011-10-03 6:57 am
a fair coin is thrown 4times
find the probablitiy of getting the same results in the first throw and the yhird throw
THXXXXXXX
find the probablitiy of getting the same results in the first throw and the yhird throw
THXXXXXXX
回答 (2)
2011-10-03 11:35 pm
✔ 最佳答案
Answer is 1/2.
All possible combinations of first and third throw are HH,HT,TH,TT
Among those 4 possible outcomes, only 2 are appropriate (i.e. HH, TT).
That means Possibility = 2/4 = 1/2
2011-10-03 7:08 am
Answer : 1/2
The first throw can be either 'head' or 'tail'. Each throw is independent to other throws. The second and fourth throws can not influence the third throw. So, the probability is just 1/2
The first throw can be either 'head' or 'tail'. Each throw is independent to other throws. The second and fourth throws can not influence the third throw. So, the probability is just 1/2
收錄日期: 2021-04-26 19:17:50
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