Throughout these last few weeks we have covered all sections of probability and for Fe8a our unit test will be on the coming Tuesday and it will cover Theoretical Probability and Experimental Probability which there formulas are TP= favorable outcomes/total outcomes EP= times event occurs / tries. In my last blog I explained both of these concepts in my last blog. Now for odds for and against, odds are expressed in a ratio of part to part unlike probability which is a part to whole ratio. so the formula for odds for is favorable out comes/ total outcomes-favorable so the ratio could look like this 3:4 and remember if the odds for are 3:4 you don't have a 75% chance. You would actually have a 3/7 probability or a 42.86% chance. In odds against is the formula is Unfavorable out comes/ total outcomes-unfavorable. Also the ratio of odds for is the same as odds against but the two numbers are reversed. So in the same example the ratio would be 4:3 and you would have a 4/7 or a 57.14% chance.
Recently in science we have been looking at making water drinkable there are many different ways, some of which we can use during a black-out. The main source of water we use is our tap-water the city water and the reason for this is that it is cheap and easy to get. Also there are pump filters that have little filter membrane that only water molecules can fit through. Next UV water filters filter water with UV radiation to kill any living organisms in the water. The last resort is to boil water on a stove or open fire this water is good for 30 minutes before it needs to be boiled again.
Eric out
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