Answer
$P(victim~and~the~offender~of~different~sexes)=\frac{2399}{7285}=0.3293$
Work Step by Step
$P(both~same~sex)=\frac{4886}{7285}\approx0.6707$
The events "victim and the offender of different sexes" is the complement of "both same sex".
$P(victim~and~the~offender~of~different~sexes)=1-P(both~same~sex)=1-\frac{4886}{7285}=\frac{7285}{7285}-\frac{4886}{7285}=\frac{2399}{7285}=0.3293$