Skip to main content

Probability Exercise with Answer | Example 2

Probability Exercise

 A bowl contains 8 white balls, 4 black balls and 3 red balls. We randomly draw 3 balls from this bowl.

What is the probability of getting:

1. A white ball and two red balls.

2. Two black balls.

3. At least a white ball.

4. Three balls of the same color.

The solution

1. The number of possible cases for this experiment is:
 
Bernoulli's law



The number of appropriate cases is: 
probability theory

And from it  P1= 24/455





2. The number of suitable cases is:
                 
Math for 12th grade

And from it  P2= 66/455

3. The mutually exclusive event of event A: ''Three balls of the same color'' is the event Ā: ": ''We don't get any white ball"

We have:
       
12th grade


And from it:

probability exercises

4. Number of suitable cases: 
                 
Grade 12


And from it   P4= 61/455



Comments

Popular posts from this blog

Tracing shapes for kids ages 3-5 | part 1

Tracing shapes worksheet for preschool Kids will have fun learning their shapes as they trace the shape and color their very own shapes. This is a great activity for toddler, preschool, pre k, kindergarten, and first grade students. Tracing Shapes Worksheets for Preschool  (All Activity Papers) Home Page

Subtraction Word Problems, Worksheet 3

Subtraction Word Problems The child will enjoy solving this subtraction problem by subtracting the broken eggs.

Puzzle of Crossing the Dark Bridge in 17 Minutes

How to cross the bridge in 17 minutes?  4 people who want to cross a bridge at night with a torch have to cross the bridge in the dark in 17 minutes -Since the bridge cannot carry more than two people, it means that the bridge can be crossed by one or two people. -To cross the bridge, a person must be holding the torch in his hand (meaning one person must return the torch so that the others can cross). -The first person A takes 1 minute to cross the bridge. -The second person B takes 2 minutes to cross the bridge. -The third person C takes 5 minutes to cross the bridge. -The fourth person D takes 10 minutes to cross the bridge. How can these people cross the bridge in 17 minutes? The solution: -Person A and Person B cross, so it takes 2 minutes. -Person B returns with the torch so it has taken 2 minutes. -He gives the torch to people C and D to cross t