Question

Yesterday, the price of a loaf of breadat five supermarkets was $1.54, $1.69,$1.79, $1.57, and $1.71, but today each supermarket raised its price by $0.05.What is today's mean price of a loaf of bread at the five supermarkets?A. $1.660 B. $1.76C. S1.81D. $1,71

Answer 1

Explanation:

Step 1. We are given the price of a loaf of bread at 5 supermarkets

`$ 1.54, $1.69,$ 1.79, $1.57,$ 1.71 $`

the price was raised by 0.05 in each supermarket, therefore, the first step is to add 0.05 to all of the prices:

`1.59,1.74,1.84,1.62,1.76`

These are the new prices.

Step 2. The question is:

• What is today's mean price of a loaf of bread at the five supermarkets?

This means that we need to calculate the mean, and for that, we add all of the prices and divide by the number of supermarkets:

`Mean=(1.59+1.74+1.84+1.62+1.76)/(5)`

Step 3. Solving the operations, the result is:

`\begin{gathered} Mean=(8.55)/(5) \\ \downarrow \\ \boxed{Mean=1.71} \end{gathered}`

The mean price is 1.71, this is shown in option D.

Answer: D. $1,71