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vipertongn
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Water shortages require water rationing policies. From past records, we know that the probability that water needs to be rationed in a southland water district in any given year is 0.15. Assume that water rationing in consecutive years are independent events.
Let X be the number of years with water rationing in a sample of ten years. What is the expected (mean) number of years with water rationing in 10 years for a southland water district?
For this one E(X)=np=1.5 i think
What is the probability that there would be no water rationing in the next ten years?
I'm not sure how to calculate this...i know at least for one year it should be .85 is that right?
What is the probability that there would be water rationing in at least two of the next ten years?
I'm assuming this would be 2*.15
Let X be the number of years with water rationing in a sample of ten years. What is the expected (mean) number of years with water rationing in 10 years for a southland water district?
For this one E(X)=np=1.5 i think
What is the probability that there would be no water rationing in the next ten years?
I'm not sure how to calculate this...i know at least for one year it should be .85 is that right?
What is the probability that there would be water rationing in at least two of the next ten years?
I'm assuming this would be 2*.15