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30 March, 21:44

Find the probability:

A shelf hold 3 novels, 2 biographies, and 1 history book. Two students in turn choose a book at random. What is the probability that the student choose the following?

a history, then a novel

1/2

1/5

1/10

1/15

+5
Answers (2)
  1. 30 March, 23:47
    0
    Part 1:

    3+2+1 = 6 total units

    There is only 1 history book.

    1/6 total.

    Part 2:

    6-1 (we've lost the history book) = 5 total units

    3 novels. = 3/5

    Part 3:

    1/6 * 3/5 = 3/30 or 1/10
  2. 31 March, 00:33
    0
    The answer is 1/2 because i look at the numbers
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