The monthly demand for transistors is known to have the following probability distribution. Demand(n): 12 3 4 5 6 Probability(p): 0.1 0.15 0.2 0.25 0.18 0.12 Determine the expected demand for transistors. Also obtain the variance. Suppose the cost (C) of producing ‘n’ transistors is given by the relationship. C=10,000 500 n. Determine the expected cost.