Their geometric mean is the cube root of 8*4*12 = cuberoot(384) = 7.268 (to 3 dp)
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Well, if you really mean divisible by 4 then the answer is 100% that is probability 1.00. On the other hand, if you mean evenly divisible by 4, then in the numbers 1-12 there are 3 numbers evenly divisible by 4 (4, 8, 12) since there are 12 numbers then the probaqbility of a number divisible by 4 is 3/12 = 0.25
Mean = 4 so sum = 4*4 = 16 The sum of the three numbers is 12 so the fourth is 16-12 = 4.
the mean of those numbers is 7
Do you mean, what is 16:12 as ratio equivalent to? If so, then it is 4:3