The average of 7 numbers is x. When the number 60 is added to the set, the average becomes $x + 3$ . What is x?

33Correct answerYour answer36Correct answerYour answer39Correct answerYour answer57Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer B

Correct answer: B

Worth noting

39 is the new average, $x + 3$ . 57 only subtracts 3 from 60.

Ten questions from Averages, at your own pace.

Ten questions from Averages, at your own pace.

The average of 7 numbers is x. When the number 60 is added to the set, the average becomes x+3x + 3x+3. What is x?