What is the mean (average) of the numbers 4, 7, 9, and 13?

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Study for the PSAT 8/9 Math Test. Practice with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is the mean (average) of the numbers 4, 7, 9, and 13?

Explanation:
Mean is found by adding all the numbers and dividing by how many numbers there are. Here, 4 + 7 + 9 + 13 = 33, and there are 4 numbers, so the mean is 33 ÷ 4 = 8.25. So the average of these numbers is 8.25. The other values would come from different totals (for example, a total of 32 gives 8, 30 gives 7.5, and 36 gives 9), but with these numbers the sum is 33, yielding 8.25.

Mean is found by adding all the numbers and dividing by how many numbers there are. Here, 4 + 7 + 9 + 13 = 33, and there are 4 numbers, so the mean is 33 ÷ 4 = 8.25. So the average of these numbers is 8.25. The other values would come from different totals (for example, a total of 32 gives 8, 30 gives 7.5, and 36 gives 9), but with these numbers the sum is 33, yielding 8.25.

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