Purchase Solution

Random Variables and Probability : Sampling Without Replacement

Not what you're looking for?

Ask Custom Question

A carton of 30 lightbulbs includes 5 defective ones. If 4 light bulbs are drawn at random (without replacement), what is the probability that;

(a) 2 of the selected light bulbs are defective.
(b) Not all the selected light bulbs are defective.

Purchase this Solution

Solution Summary

Sampling Without Replacement and defective light bulbs are investigated. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

Solution Preview

Please see the attached file for the complete solution.
Thanks for using BrainMass.

I'm having difficulty with the set up and working of the problem.

A carton of 30 lightbulbs includes 5 ...

Purchase this Solution


Free BrainMass Quizzes
Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

Geometry - Real Life Application Problems

Understanding of how geometry applies to in real-world contexts

Probability Quiz

Some questions on probability

Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.

Graphs and Functions

This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.