Simplify: (-3-10i)+(1+2i)+(-5+6i)
a)3-14i

b)-7-2i

c)-2-8i

d)-9-6i

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