The probability of A is 1/6 and the probability of B is 1/2. what is the probability of A or B or both happening?
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To find the mean, you have to add all the numbers then divide it by how many numbers there are.
In this case, you'll need to add all those numbers and divide it by 4.
The mean is 1995.
In this case, you'll need to add all those numbers and divide it by 4.
The mean is 1995.