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Which of the following is the geometric mean of 3 and 12.(a) 4(b) 6(c) 9(d) 10This question was posed to me during an internship interview.Question is from Geometric Progression(G.P.) topic in chapter Sequences and Series of Mathematics – Class 11

Answer»

The correct option is (b) 6

Explanation: We KNOW, geometric MEAN of two numbers a and b is GIVEN by

G.M. = \(\sqrt{a*b}\)

So, G.M. of 3 and 12 is \(\sqrt{3*12} = \sqrt{36}\) = 6.



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