Ask Question
13 February, 22:32

A reading list contains 3 historical books and 4 science-fiction books. What is the probability that Tena will randomly choose a historical book for her first repost and a science-fiction book for her second?

a. 12/49

b. 2/9

c. 2/7

d. 1 2/7

+4
Answers (1)
  1. 13 February, 22:53
    0
    There are 7 books all in all. Since the order is important, there are 7P2 (permutation of 7 taken 2) ways in which Tena can do the repost. If she picks historical books first then followed by the science-fiction, there are

    3 x 4 = 12 ways.

    The probability is therefore equal to 12 / (7P2) which is equal to 2/7. The answer is letter c.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “A reading list contains 3 historical books and 4 science-fiction books. What is the probability that Tena will randomly choose a historical ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers