GATE EC 2026 Set 1 — Question 38
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.MCQ+2 / -0.67MediumCovariance & CorrelationProbabilityEngineering MathematicsFunctions of Random Variables
Engineering Mathematics → Probability → Covariance & Correlation
Last updated
Question
Let and be random variables. The variables and are independent of each other. is uniformly distributed between -1 and 1; follows Normal distribution with zero mean and unity variance. and are defined as, and . Which of the following pairs represents the values of correlation between and and that between and ?
Correct answer
(A) 1/3 and 0
Solution
Given:
For , the PDF is for , and 0 otherwise.
.
.
.For :
.
.Since and are independent, .
Specifically, .Now, let's calculate :
.
Substitute the values we found:
.Next, let's calculate :
.
Substitute the values we found:
.So, the pair of values for correlation between and and between and is .The final answer is
1. and are independent random variables.
2. (Uniformly distributed between -1 and 1).
3. (Normal distribution with mean 0 and variance 1).
4.
5.
We need to find the correlation and .First, let's find the moments of and :For , the PDF is for , and 0 otherwise.
.
.
.For :
.
.Since and are independent, .
Specifically, .Now, let's calculate :
.
Substitute the values we found:
.Next, let's calculate :
.
Substitute the values we found:
.So, the pair of values for correlation between and and between and is .The final answer is
Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE EC question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on Probability
2026 Set 1 Q11Consider the differential equation , with…2026 Set 1 Q12A surface is given by and and are unit…2026 Set 1 Q23The relation between the input current () and the output voltage () of a circuit is governed…2026 Set 1 Q26Consider the matrix . Which…2026 Set 1 Q36Consider the two series, and , where …