Suppose \(\mathbf{E}(X^2)=3\), \(\mathbf{E}(Y^2)=4\) and \(\mathbf{E}(XY)=2\). What isĀ \(\mathbf{E}[(X+Y)^2]\) ?
Learning probability by doing !
Home » Basic probability » Expectations » Putting expectations together
Suppose \(\mathbf{E}(X^2)=3\), \(\mathbf{E}(Y^2)=4\) and \(\mathbf{E}(XY)=2\). What isĀ \(\mathbf{E}[(X+Y)^2]\) ?