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 Micheal Crichton. How many Micheal Crichton novels does Riley have in his book collection?

Answer 1

Answer: the number of Micheal Crichton novels that Riley have in his book collection is 12

Step-by-step explanation:

Riley has 40 novels so far in his book collection. 9/10 of these novels is fiction. It means that the number of fictional novels in his collection is

9/10 × 40 = 36

Of these fictional novels, 1/3 of them were written by Micheal Crichton. It means that the number of his fictional novels that was written by Micheal Crichton is

1/3 × 36 = 12

Answer 2

Total number of fiction novels by Micheal Crichton Riley have in his book collection is  12.

Step-by-step explanation:

The total number of books in the collection  = 40 books

The fraction of fiction novels  = 9 out of 10

So, total fiction novels  = $\frac{9}{10} \times 40 = 36$

⇒ Total fiction novels = 36

The fraction of fiction novels written by Micheal Crichton   = 1 out of 3

So, total fiction novels  by  Micheal Crichton   = $\frac{1}{3} \times 36 = 12$

⇒ Total fiction novels  by Micheal Crichton = 12

Hence, the total number of fiction novels by Micheal Crichton Riley have in his book collection is  12.