某人长期以来购买刮刮乐的中奖率为 2/5, x表示购买5-|||-张彩券的中奖张数,求恰有3张中将的概率。-|||-square A. _(5)^2((dfrac {2)(5))}^2((dfrac {3)(5))}^3-|||-square B. _(5)^3((dfrac {2)(5))}^3((dfrac {3)(5))}^2-|||-square C. dfrac (144)(625)-|||-square D. _(5)^3((dfrac {3)(5))}^3((dfrac {2)(5))}^2-|||-square E. dfrac (124)(625)