Probability · Exercise 57

Use the following scenario for the exercises that follow: In the game of Keno, a player starts by selecting $20$ numbers from the numbers $1$ to $80.$ After the player makes his selections, $20$ winning numbers are randomly selected from numbers $1$ to $80.$ A win occurs if the player has correctly selected $3,4,$ or $5$ of the $20$ winning numbers. (Round all answers to the nearest hundredth of a percent.)

How much less is a player’s chance of selecting 3 winning numbers than the chance of selecting either 4 or 5 winning numbers?

OpenStax, Algebra and Trigonometry 2e · §13.7 Probability · Exercise 57