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so would that be the answer
Change the reference to independence to mutually exclusive. Do you understand why the two events are not mutually exclusive?
so would that be the answer
This is not possible as the formula for probabilities is P(A or B) = P(A) + P(B) - P(A and B) and you can't add separate probabilities because the two events are not independent, probabilities also cannot be above one. is that correct?
If \(\displaystyle A\) is the event the pair multiply to an even number and \(\displaystyle B\) is the event that a pair multiply to more than thirty then those events are neither independent nor mutually exclusive. then the number \(\displaystyle \|A\|=144-36=108\). The reason being that there are \(\displaystyle 36\) pairs in which both entries are odd, meaning the product is odd. Now how pairs have a product greater than thirty \(\displaystyle \|B\|=?\)I think you mean mutually exclusive, right? This amounts to the second possible answer I suggested. It's not at all clear how much the student is expected to explain, but this more extended answer can't hurt!
Is the answer below correct?
This is the very reason that for years I would begin each probability theory class with the statement 'if you have not had the foundations class or if you do not know set operations you need to leave right now'. It is a fundamental property of counting that \(\displaystyle \|A\cup B\|=\|A\|+\| B\|-\|A\cap B\|\) That is, the number of elements in at least one of sets \(\displaystyle A\text{ or }B\) equals the number in \(\displaystyle A\) plus the number in \(\displaystyle B\) minus the number common to both, (the last term accounts the over count). In probability it becomes \(\displaystyle \mathcal{P}(A\cup B)=\mathcal{P}(A)+\mathcal{P}(B)-\mathcal{P}(A\cap B)\).This is not possible as the formula for probabilities is P(A or B) = P(A) + P(B) - P(A and B) and you can't add separate probabilities because the two events are not independent, probabilities also cannot be above one. is that correct?
Another TERRIBLE problem IF, THAT IS, it is quoted accurately.on any roll of a set of two fair 12 sided dice, the probability of obtaining a product that is an even number or a product of greater than 30, adds to a number larger than 1. Given we know the probability of an event must lie between 0 and 1 explain in your own words if this is possible