ANSWER:
90
Explanation:
We know that the relationship between doubles and total is 5: 1, therefore, we can estimate the times that doubles would come out knowing that the total is 450, by proportion we calculate:
![\begin{gathered} (1)/(5)=(x)/(450) \\ \text{ Solving for x:} \\ x=(450)/(5) \\ x=90 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/27yeoyd122pvyvpq8tkesaei79u0pm3ubn.png)
Therefore, the number of doubles expected is 90