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Conditional Probability

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Question 9

A box contains 7 fiction books, 5 non-fiction books, and 3 biographies. Two books are selected from the box at random without replacement.

a.

Draw a tree diagram to represent this information.

[3]
b.

Find the probability that the two books selected are both biographies.

[2]
c.

Given that at least one of the books selected is non-fiction, find the probability that both books are non-fiction.

[3]

Conditional Probability Questions

  1. A Level
  2. /Maths
  3. /Conditional Probability