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Old 07-25-2007   #1
coleman57
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Default What is the probability that all 9 babies will be boys in regards to probability?

What is the probability that all 9 babies will be boys in regards to probability?
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Old 07-25-2007   #2
beanie
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Not sure, but if both parents are healthy normal folks, with Mothers have the correct XX chromosomes and Fathers having XY chromosomes, then probably....5^ 9?
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Old 07-25-2007   #3
Dulce D
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One half raised to the power 9 or 1/512
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Old 07-25-2007   #4
Escuerdo
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It's (1/2)^9 = 1/512 or about .00195.
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Old 07-25-2007   #5
chandramalar27
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(1/2)^9 = 1/512 =0.00195.
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Old 07-25-2007   #6
kennyshoneypie
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there's a 50/50 chance that any baby will be a certain ***..I would say probaby rather rare that all would be boys..but eh..it could happen.
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Old 07-25-2007   #7
Aiyah
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The male to female birth ratio is not 1 to 1. The answers above all assumed there was an equal chance of a boy being born as of a girl. The source I quote below shows the *** ratios for most countries of the world. In the USA, for example, the ratio is 1.05 male births for every female birth. This means 1.05/(1.05+1)=1.05/2.05=0.5122 = 51.22% of babies born in the USA are male, NOT 50.00%.If we take 9 random births, say the next 9 babies born in the USA, then the probability that all are males is 0.5122^9, or about 0.24%.Genetic experts might argue that if the question was for a particular family then after a few boys in a row it might show that the father and mother or their environment is making it more likely than normal that the next baby will again be a boy.But for the general population, in the USA, the answer is about 0.24%.































education.yahoo.com
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Old 07-25-2007   #8
pinkapple3033
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there is always a 50/50 chance are getting either a girl or boy.the probability is 1/152 which is 0.0019531% chanceto figure it out just use a tree diagramif there is 1 baby: 0.5if there is 2 babies:0.25if there is 3 babies:0.3333....etc
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Old 07-25-2007   #9
123(nick)123
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its 5o-50 chance.
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