### Probability

Suppose we have two stocks, stock A and stock B. Suppose that each stock has the following probabilities of decreasing (D), remaining unchanged (U) and rising (R), and that they are independent. Stock A: P(D)=.2, P(U)=.1 and P(R)=.7 Stock B: P(D)=.3, P(U)=.3 and P(R)=.4 Let X=0,1,2 be the the number of stocks that RIS