there were 3 chihuahuas at the dog park last saturday, along with 9 other dogs. considering this data, how…
there were 3 chihuahuas at the dog park last saturday, along with 9 other dogs. considering this data, how many of the next 20 dogs to arrive at the park next saturday should you expect to be chihuahuas? chihuahuas
Answer
Explanation:
Step1: Calculate the proportion of chihuahuas
The total number of dogs last Saturday is $3 + 9=12$. The proportion of chihuahuas is $\frac{3}{12}=\frac{1}{4}$.
Step2: Find the expected number
Multiply the proportion by the number of new - arriving dogs. So the expected number of chihuahuas among the next 20 dogs is $\frac{1}{4}\times20 = 5$.
Answer:
5