A utility company sends surveys to $200$ of its customers in such a way that $100$ surveys are sent to customers who pay their bills on time, $50$ surveys are sent to customers whose bills are less than $30$ days late, and $50$ surveys are sent to customers whose bills are more than $30$ days late. Which type of sample does this represent?

The SubShop had 36, 45, 41, and 38 customers during the lunch hour the last four days. Find the mean of the number of customers.

It is estimated that amounts of money spent on gasoline by customers at a gas station follow a normal distribution with a standard deviation of $2.50. It is also found that 10% of all customers spent more than$25. What percentage of customers spent less than $20?

Of the fifty customers, 35 bought the advertised item. What fraction of the customers bought the advertised item? What percent?

On Thursday, a restaurant serves iced tea to 35 of its 140 customers. What percent of the customers order iced tea?

How can the amount of collections from customers be determined?

On average, a clothing store gets 120 customers per day.

What is the probability that the store will have fewer than 12 customers in the first two hours?

For each of the terms below, write a sentence explaining how it relates to the period following ratification of the Constitution.

tariff

Why did South Carolina threaten to secede over the tariff issue?

Ralph's Pretty Good Pizza offers five pizza toppings and lets customers choose any two toppings for the price of one. How many different pairs of toppings can customers select?

Rob collects data about how many customers enter and leave a store every hour. He records a positive number for customers entering the store each hour and a negative number for customers leaving the store each hour.

$$\begin{array}{| l | l |} \text{ } & \text{Entering} & \text{Leaving}\\\hline \text{1:00 to 2:00} & \text{30} & \text{-12}\\ \text{2:00 to 3:00} & \text{14} & \text{-8}\\ \text{3:00 to 4:00} & \text{18} & \text{-30}\\ \end{array}$$

a. During which hour did more customers leave than arrive? b. There were 75 customers in the store at 100 . The store must be emptied of customers when it closes at 5 : 00. How many customers must leave the store between 4 : 00$ and 5 : 00 ?

On average, $24 \%$ of customers who buy shoes in a particular store buy two or more pairs. One weekend, 350 customers purchased shoes. How many can be predicted to buy two or more pairs? If 107 customers buy more than two pairs, did more customers than normal buy two or more pairs?

Last year Chu found $3$ more customers than Ralph found. This year Chu found $2$ times as many as customers as he found last year. Let $r =$ the number of customers Ralph found last year. Write an expression for the number of customers Chu found this year.

What is the number of customers that enter in a store an example of?