SOLUTION: Out of the 45 books in the bookshelves, 18 are mathematics books, 10 are science books, 9 are history books and 8 are story books. If you pick one book at random, what is the proba

Algebra ->  Probability-and-statistics -> SOLUTION: Out of the 45 books in the bookshelves, 18 are mathematics books, 10 are science books, 9 are history books and 8 are story books. If you pick one book at random, what is the proba      Log On


   

Question 1206547: Out of the 45 books in the bookshelves, 18 are mathematics books, 10 are science books, 9 are history books and 8 are story books. If you pick one book at random, what is the probability that it is a science or mathematics book?
Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.

Take the sum of Math and Sci books and relate it to the total


    P = %2818%2B10%29%2F45 = 28%2F45 = 0.6222  (rounded).    ANSWER

Solved and explained.