Back to Topic 4.7 — Discrete random variables
4.7.4Math AA3 flashcards

Fair games & expected money

Practice Flashcards

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Card 1 of 34.7.4
4.7.4
Question

When is a game fair?

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All 3 Flashcards — Fair games & expected money

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Card 1concept

Question

When is a game fair?

Answer

When the expected net gain E(X) = 0.

Card 2concept

Question

How do you find a fair prize?

Answer

Let X be the net gain, set E(X) = 0, and solve for the prize.

Card 3concept

Question

What should X be in a game (gain) problem?

Answer

The net gain — include any cost or loss.

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