On Roberto’s shelf are: • 6 mystery books • 5 science books • 4 history books • 3 adventure books Roberto will randomly choose 1 book to read. What is the probability that he will choose an adventure book? ​

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same