Question

27. You are researching the price of a phone. You found an average price of $320.00. One phone cost $295 and another cost $375. Find the price of the third phone.​

Answer 1

$290

Explanation:

Assuming there are only three phones, let x = the third phone's price

We already got the prices of the two phones: $295 and $375.

(295 + 375 + x)/3 = 320

First, multiply both sides by 3 to isolate the expression in the parenthesis.

[(295 + 375 + x)/3 = 320]3

295 + 375 + x = 960

670 + x = 960

Subtract 670 from both sides

670 + x = 960

- 670 - 670

x = 290