Q: An object is made of two equal parts by volume; one part has density ρ₀ and the other part has density 2ρ₀. What is the average density of the object?
(a)3ρ₀
(b)3⁄2 ρ₀
(c)ρ₀
(d)1⁄2 ρ₀
Correct Answer: (d)
The correct answer is (b) '3⁄2 ρ₀'. This question from the Quantitative Aptitude & Data Interpretation domain tests knowledge of Numerical Ability.