If the mean of 10 numbers is 7, what is their sum?

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Master the Certify Teacher EC-6 (391) Mathematics Test. Use flashcards and multiple choice questions with explanations. Boost your confidence and excel in your exam!

Multiple Choice

If the mean of 10 numbers is 7, what is their sum?

Explanation:
Mean is the total sum divided by how many numbers there are, so to find the sum you multiply the mean by the count. With a mean of 7 across 10 numbers, the sum is 7 × 10 = 70. Checking the other options: a total of 60 would give an average of 6, 80 would give 8, and 90 would give 9. Only 70 yields an average of 7.

Mean is the total sum divided by how many numbers there are, so to find the sum you multiply the mean by the count. With a mean of 7 across 10 numbers, the sum is 7 × 10 = 70. Checking the other options: a total of 60 would give an average of 6, 80 would give 8, and 90 would give 9. Only 70 yields an average of 7.

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