Question

A bookshelf contains 10 mysteries, 8 biographies, and 6 science fiction books. A book is randomly selected, replaced, then another is selected. Find the probability, P(biography, then science fiction) as a simplified fraction.

Answer 1

10+8+6=24 the ratio of taking the biographies to the science books are: 4:3

Explanation:

That is the answer because 10+8+6= total 24 books

ratio of biographies= 24:8=3:1

ratio of science fiction= 24:6= 4:1

hence according axiom 1 ab × Ac= aa × BC

3:1×4:1= 4:3

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