Q: Let X₁ and X₂ be two independent random variables having variances k and 4 respectively. If the variance of Y = 3X₂ − X₁ is 49, then what is the value of k?
(a)7
(b)13
(c)9
(d)11
Correct Answer: (b)
The correct answer is (c): 9. Subject: Quantitative Aptitude & Data Interpretation | Sub-topic: Statistics & Probability Note: This answer was determined through AI-based research. Verify against the official answer key when available.