A number is chosen at random from 1 to 15. Find the probability of selecting an odd prime number.

Fast please

In a column proof the right column states your reasons

How is this equation completed? i cannot find any examples in the book.

90.0% complete a b c d e confirm last week, your delivery runs took 7 hours 12 minutes on monday, 6 hours 46 minutes on wednesday, and 6 hours 53 minutes on friday. what was your average time for a delivery run?