SOLUTION: In a certain federal prison, it is known that 2/3 of the inmates are under 25 years of age. It is also known that 3/5 of the inmates are male and that 6/8 of the inmates are female

Question 1172481: In a certain federal prison, it is known that 2/3 of the inmates are under 25 years of age. It is also known that 3/5 of the inmates are male and that 6/8 of the inmates are female or 25 years of age or older. What is the probability that a prisoner selected at random from this prison is female and at least 25 years old?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
In a certain federal prison, it is known that 2/3 of the inmates are under 25 years of age. It is also known that 3/5 of the inmates are male and that 6/8 of the inmates are female or 25 years of age or older.



Hi  

	< 25	>=25	Total	

Male				

Female			2/5	

Total		1/3						

What is the probability that a prisoner selected at random from this prison is female and at least 25 years old?

P = 



Following an ex of inmate population of 1200

	< 25	>=25	Total	

Male	480	240	720	

Female	320	160	480	

Total	800	400   1200

 160/1200 = 2/15 

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