Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Numerical Ability

Topic

Ratios

Question:

Find the mean proportion of \(\frac{1}{9}\) and \(\frac{1}{121}\) .

Options:

\(\frac{1}{20}\)

\(\frac{1}{16}\)

\(\frac{1}{35}\)

\(\frac{1}{33}\)

Correct Answer:

\(\frac{1}{33}\)

Explanation:

Mean proportion of a and b = \(\sqrt {a × b }\)

⇒ Mean proportion = \(\sqrt {\frac{1}{9} × \frac{1}{121}}\)

                               = \(\frac{1}{3 × 11}\)  = \(\frac{1}{33}\)