Help. Probability is not equal to 1.0

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According to a survey of 2000 homeowners, 800 of them own homes with 3 bedrooms and 600 of them own homes with 4 bedrooms. If one home owner is selected at random from these 2000 home owners find the probability that this home owner owns a house that has 3 bedrooms or 4. Explain why the probability is not =1.0

May 5th, 2015

the probability is (800+600)/2000= 0.70. 

The probability is not 1 because there are home owners own home has more than 4 bedrooms or less than 3 bedrooms. 

May 5th, 2015

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