For two random variables x and y, covariance between 2x and y, cov(2x,y)=4. Hence, cov(5x-2,2y-5) is:

Q102Section III (Statistics)102 of 190

Covariance is bilinear: shifts vanish, scalars multiply out

For two random variables x and y, covariance between $2x$ and $y$ , $\mathrm{cov}(2x,y)=4$ . Hence, $\mathrm{cov}(5x-2,2y-5)$ is:

Pick an option to check your answer.

Keyboard: A–D answer · S solution · ←/→ previous/next