Chapter 12.7, Problem 3STP

For Exercises 1-5, choose the correct letter.

You toss a number cube. What are the odds against getting a number less than 3?

A. 2:1 B. 1:2 C. 3:1 D. 1:3

To determine

Find the odds against getting a number less than 3.

Answer to Problem 3STP

A

Explanation of Solution

Given:

You toss a number cube.

Formula Used :

  $\text{odds against E = }\frac{\text{number of failures }}{number\text{ of successes of E}}$

Calculation:

A number cube has 6 faces and each face has numbers from 1 to 6 on it .

Number of successes of getting number less than 3 = 2 = {1,2}

Number of failures of getting number less than 3 = 4 = {3,4,5,6}

  $\text{odds against getting a number less than 3 = }\frac{\text{number of failures}}{\text{number of successes}}=\frac{4}{2}=\frac{2}{1}$ = 2 : 1