examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Back to all chapters
# Expected Value

If you play roulette, are you going to break-even? Maybe sometimes, but not if you play forever, because the expected value is negative. The expected value finds the average outcome of random events.

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

If \(E[3X+Y] = 11\) and \(E[X] = 2,\) what is \( E[Y]?\)

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

If \(E[4X ] = 16 ,\) what is \( E[X] ?\)

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

If \(E[3X+9Y] = 6\) and \(E[3X+Y] = 5,\) what is \( E[X+Y]?\)

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

If \( E[X] = 3 ,\) what is \(E[3X + 1 ]?\)

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

If \(E[X] = 4, E[Y] = 4 ,\) what is \(E[4X+3Y]?\)

examples, and problems from the community.

including olympiad champions, researchers, and professionals.

Sign up to access problem solutions.

by **Brilliant Staff**

×

Problem Loading...

Note Loading...

Set Loading...