Question

the table shows the number of people who rode two different carnival rides during the first hour of the fair on opening day. based on the data in the table, what is the approximate value of p(adult|rode a ferris wheel)? a. 0.848 b. 0.750 c. 0.636 d. 0.477

Explanation:

Step1: Recall conditional - probability formula

The formula for conditional probability is $P(A|B)=\frac{P(A\cap B)}{P(B)}$. In the context of the table, $P(\text{adult}|\text{rode a Ferris wheel})=\frac{\text{Number of adults who rode Ferris wheel}}{\text{Total number of people who rode Ferris wheel}}$.

Step2: Identify values from the table

The number of adults who rode the Ferris wheel is 126, and the total number of people who rode the Ferris wheel is 198.

Step3: Calculate the probability

$P(\text{adult}|\text{rode a Ferris wheel})=\frac{126}{198}\approx0.636$.

Answer:

C. 0.636