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SSC Selection Post 2022 PYQ — Question 71

SSC Selection Post - Matriculation Level 2022 - 3 Aug 2022 - Shift 1 • Quantitative Aptitude • Q71

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The third proportional to 0.9 and 0.3 is:

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Correct answer: A

Explanation

The correct answer is option 1 i.e. 0.1.

 

a=0.9 , b=0.3

​​​​​​​ab=bx​​​​​​​\frac{a}{b} = \frac{b}{x}

⇒ 0.90.3=0.3x\frac{0.9}{0.3} = \frac{0.3}{x}

⇒  0.90.3=3 \frac{0.9}{0.3} = 3

solve for x= 3=0.13=0.3x⇒x=0.33=0.13=0.13 = \frac{0.3}{x} \Rightarrow x = \frac{0.3}{3} = 0.1

0.1 is the third proportional to 0.9 and 0.3.