There are 7 fish in an aquarium.
(a) Find the probability that there are 5 male and 2 female fish?
Answer: 21/238
(b) Among the 7 fish, determine whether the probability of getting 5 female fish or the probability of getting 4 female fish is higher? Explain your answer.
Answer: the probability of getting 4 female fish
唔該詳細既解釋,,因為唔係好明b題應該點做
Maths:More About Protability
2010-12-13 12:05 am
回答 (2)
2010-12-13 12:20 am
2010-12-13 12:31 am
a) 計左個combination 先 7C5 / 7C2 = 21
之後就計probability of 5 male and 2 female fish?
21 / 2^7 (個分子係combin. 個分母係全部既fishes )
= 21/238
b ) 已經計左getting 5 female fish 既probab.係=21
the probability of getting 4 female fish 係: 7C4 = 105
好明顯係the probability of getting 4 female fish
之後就計probability of 5 male and 2 female fish?
21 / 2^7 (個分子係combin. 個分母係全部既fishes )
= 21/238
b ) 已經計左getting 5 female fish 既probab.係=21
the probability of getting 4 female fish 係: 7C4 = 105
好明顯係the probability of getting 4 female fish
收錄日期: 2021-04-13 17:42:27
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