allery$16$ आणि $25$ मधील मध्यम प्रमाणपद (mean proportional) शोधा.
A$18$
B$20$
C$22$
D$24$
Answer & Solution
Correct answer: B. $20$
मध्यम प्रमाणपद $= \sqrt{a \times b} = \sqrt{16 \times 25} = \sqrt{400} = 20$.
पर्याय A (18) ही अंकगणितीय सरासरी $(16+25)/2 \approx 20.5$ खाली पूर्णांक केलेली आहे — जी जवळची आहे, परंतु विचारलेली भूमितीय सरासरी नाही.
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