Must be the ganja

what is the mean absolute deviation for 7, 5, 1, 6, 2, and 3?
6
3
2
1

Which ratio is equivalent to 10: 85

Which segments are congruent? o jn and ln o jn and nm o in and nk onk and nm

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible