Quantitative Aptitude • Ratio, Average & MixtureMedium
What is the mean proportional between 27 and 192?
A. 72✓ Correct Answer
B. 144
C. 75
D. 109.5
💡 Solution & Explanation
The mean proportional between two numbers a and b is √(a × b). Here √(27 × 192) = √5184 = 72. Check: 27 : 72 = 72 : 192, because 27 × 192 = 72 × 72 = 5184. The average (109.5) is a different idea.
More Quantitative Aptitude Ratio, Average & Mixture questions
- An amount of ₹22,800 is shared among P, Q and R in the ratio 1 : 4 : 7. How much does R get?
- What is the mean proportional between 54 and 24?
- The average weight of 9 students increases by 2 kg when one student weighing 40 kg is replaced by a new…
- The average of 14 numbers is 50. When one more number is added, the average becomes 53. What is the number…
- An amount of ₹8,550 is shared among P, Q and R in the ratio 2 : 1 : 6. How much does R get?