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Logic
Posted:
Wed Mar 20, 2013 8:40 pmby 007math
I seem to miss these questions each time they come up so...
The probability that statement P is true is 4/5, and the probability that statement Q is true is 3/4. Determine the probability that P->Q is false.
I can't remember the answer, but I think its supposed to be 1/5.
Re: Logic
Posted:
Wed Mar 20, 2013 8:42 pmby 007math
Heh. I got it. Never mind.
Re: Logic
Posted:
Wed Mar 20, 2013 9:05 pmby sxk1693
Can you tell me if this method is correct.
The only way and if, then statement can be false is if the first statement is true and the second statement is false. So, this if-then statement will be false when P is true and Q is false.
Therefore: [unparseable or potentially dangerous latex formula]
Re: Logic
Posted:
Wed Mar 20, 2013 9:39 pmby 007math
^^Yup. Apparently typing out the problem helped me realize that XD
Re: Logic
Posted:
Wed Mar 20, 2013 10:16 pmby 101dalmatians
Wait can someone explain those - all types - to me - and the significance of te arrows?
Re: Logic
Posted:
Wed Mar 20, 2013 10:19 pmby rcoker7
This page should be helpful.