Question

Riley has 40 novels so far in his book collection. 9/10 of these novels is fiction. Of these fictional novels, 1/3 of them were written by Michael Crichton. How many Michael Crichton novels does Riley have in his book collection

Answer 1

Answer:

12

Step-by-step explanation:

Number of novels in the book collection of Riley = 40

Ratio of fictional novels in the book collection = $\frac{9}{10}$

Number of fictional novels =  Ratio of fictional novels in the book collection × Number of novels in the book collection of Riley = $\frac{9}{10}\times 40=36$

Ratio of fictional novels written by Michael Crichton = $\frac{1}{3}$

Number of fictional novels written by Michael Crichton =  Ratio of fictional novels written by Michael Crichton × Number of novels in the book collection of Riley = $\frac{1}{3}\times 36=12$

Therefore, number of novels that Riley has in the book collection of Michael Crichton = 12