Let the random variable x denote the number of network blackouts in a day. the
probability mass function of x is:
x 0 1 2
p(x ) 0.7, 0.2, 0.1
a small internet trading company estimates that each networkblackout results in a $500 loss. compute expectation and variance of this company 's daily loss due to blackouts

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.