katy runs a day care center. so far this year, the enrollment has consisted of 2 toddlers and 8 children of…
katy runs a day care center. so far this year, the enrollment has consisted of 2 toddlers and 8 children of other ages. considering this data, how many of the next 20 children to enroll should you expect to be toddlers? toddlers
Answer
Explanation:
Step1: Calculate the proportion of toddlers
The total number of children so far is $2 + 8=10$. The proportion of toddlers is $\frac{2}{10}=\frac{1}{5}$.
Step2: Calculate the expected number of toddlers
We expect the same proportion to hold for the next 20 - child enrollment. So the expected number of toddlers is $\frac{1}{5}\times20 = 4$.
Answer:
4