Bryan, an office manager, needs to find a courier to deliver a package. The first courier he is considering charges a fee of $10 plus $3 per pound. The second charges $5 plus $4 per pound. Bryan determines that, given his package's weight, the two courier services are equivalent in terms of cost. What is the weight?

The discrete random variables x and y take integer values with joint probability distribution given by f (x, y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x, y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).