Question

1. the manager of a coffee shop recorded the number of customers who put vanilla creamer or chocolate creamer in their coffee during one hour and classified them by age. the results are shown in the table. what percentage of these customers put chocolate creamer in their coffee during this hour?

age 18 - 30 age 31+
vanilla 2 4
chocolate 6 8
a. 30%
b. 14%
c. 70%
d. 75%

Explanation:

Step1: Calculate total number of customers

Add up all the values in the table: $4 + 2+8 + 6=20$.

Step2: Calculate number of customers who used chocolate creamer

The number of customers who used chocolate creamer is $8 + 6=14$.

Step3: Calculate the percentage

Use the formula $\text{Percentage}=\frac{\text{Number of customers who used chocolate creamer}}{\text{Total number of customers}}\times100\%$. So, $\frac{14}{20}\times100\% = 70\%$.

Answer:

C. 70%