# Question

With reference to Exercise 7.22, find

In exercise

If the joint probability distribution of X1 and X2 is given by

f(x1, x2) = x1x2 / 36

(a) The joint distribution of Y1 = X1 + X2 and Y2 = X1 – X2;

(b) The marginal distribution of Y1.

In exercise

If the joint probability distribution of X1 and X2 is given by

f(x1, x2) = x1x2 / 36

(a) The joint distribution of Y1 = X1 + X2 and Y2 = X1 – X2;

(b) The marginal distribution of Y1.

## Answer to relevant Questions

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