A parabola has its vertex at (10,5). One point on the parabola is (12, 8). Which is another
point on the parabola?
A. (8, 12)
C. (12, -8)
B. (-12,8)
D. (8,8)

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable