SBI Junior Associate 2015 · Question 149 of 200

What will come in place of the question mark (?) in the given question? $$\frac{(0.8)^{3}-(0.4)^{3}}{(0.8)^{3}+(0.8)^{3}}=?$$

simplification

A8/9
B7/16Correct
C9/11
D11/13
E7/9

Answer: B. 7/16

Explanation

Expression : $$\frac{(0.8)^{3}-(0.4)^{3}}{(0.8)^{3}+(0.8)^{3}}=?$$ = $$\frac{0.512 - 0.064}{0.512 + 0.512}$$ = $$\frac{0.448}{1.024} = \frac{448}{1024}$$ = $$\frac{7}{16}$$

Source: SBI Clerk 25 Jan 2015 Paper with Solutions — Cracku · reliable-secondary

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