What will come in place of question mark (?) in the given questions?
$$\frac{(0.6)^3 - (0.4)^3}{(0.6)^3 + (0.4)^3}$$ = $$\frac{(0.6 - 0.4) (0.36 + 0.24 + 0.16)}{[(0.6 +0.4) (0.36 - 0.24 + 0.16)}$$
= 0.152/0.28
= 19/35
Option C is the correct answer.
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