What is the mean of the numbers 80%, 92%, 91%, 75%, 89%, 84%, 0%, and 85%

The following division is being performed using multiplication by the reciprocal find the missing numbers is 5/12 divided by x/3 equals 5/12 times x/10 equals 1/x

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Will give a: 122 b: 90 c: 48 d: 180