A) 3.4
B) 0.34
C) 1.1
D) 11
Correct Answer: B
Solution :
[b] \[\frac{(0.67\times 0.67\times 0.67)-(0.33\times 0.33\times 0.33)}{(0.67\times 0.67)+(0.67\times 0.33)+(0.33\times 0.33)}\] \[=\frac{{{(0.67)}^{3}}-{{(0.33)}^{3}}}{{{(0.67)}^{2}}+(0.67\times 0.33)+{{(0.33)}^{2}}}\] \[=\frac{(0.67-0.33)[{{(0.67)}^{2}}+(0.67\times 0.33)+{{(0.33)}^{2}}]}{{{(0.67)}^{2}}+(0.67\times 0.33)+{{(0.33)}^{2}}}\] \[=0.67-0.33=0.34\] |
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