Resources For Teachers For Tutors For Students & Parents Pricing
Create Free Account
Year 11 Maths - Specialist (Unit 1 and Unit 2) Simulation, sampling and sampling distributions

Mean, variance and standard deviation of a discrete random variable

ACCOUNT REQUIRED

Unlock all 20 questions & worked solutions

You're viewing a free preview. Create an account to access the complete question set, step-by-step solutions, and progress tracking.

Sign Up Log In
All Questions

Access the full question set for every topic.

Worked Solutions

Step-by-step explanations for every answer.

Track Progress

Mark questions right or wrong and monitor your growth.

It's Free

No credit card required - sign up in under a minute.

Questions
Question 1
197579

The discrete random variable \(X\) has the probability distribution shown. Find the mean \(E(X)\).

\(x\)\(0\)\(1\)\(2\)\(3\)
\(P(X=x)\)\(0.1\)\(0.3\)\(0.4\)\(0.2\)
1.7
 (1 d.p) 1 mark

📚 Want More Questions?

There are 19 more questions available. Create your free account to access the complete question set with detailed solutions.

Get Full Access Already Have Account?