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Averages · Question 6 of 62

Question 6

EasyOriginal question

The average of six numbers is 44. Five of them are 38, 45, 40, 51 and 36. What is the sixth number?

10Correct answerYour answer42Correct answerYour answer44Correct answerYour answer54Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

Total of six numbers = $6 \times 44 = 264$ .
Total of the five given = $38 + 45 + 40 + 51 + 36 = 210$ .
Sixth number = $264 - 210 = 54$ .

Worth noting

Multiply by 6, not 5: $5 \times 44 - 210$ gives 10.

Concept: Finding a missing value from the average
Typical timeTypical: 40 s
Your timeYours: —

The rule this testsSimple average

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