Question : What is the mean proportional of 8.41 and 16.81?
Option 1: 13.69
Option 2: 9.88
Option 3: 11.89
Option 4: 12.79
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Correct Answer: 11.89
Solution :
Mean proportions of 8.41 and 16.81
= $\sqrt{8.41\times16.81}$
= $2.9 × 4.1$
= $11.89$
Hence, the correct answer is 11.89.
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