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Omni-MATH / What number is placed in the shaded circle if each of the numbers…

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problem

What number is placed in the shaded circle if each of the numbers 1,5,6,7,13,14,17,22,261,5,6,7,13,14,17,22,26 is placed in a different circle, the numbers 13 and 17 are placed as shown, and Jen calculates the average of the numbers in the first three circles, the average of the numbers in the middle three circles, and the average of the numbers in the last three circles, and these three averages are equal?
Plain-text mathematical notation (without MathML)
What number is placed in the shaded circle if each of the numbers 1,5,6,7,13,14,17,22,26 is placed in a different circle, the numbers 13 and 17 are placed as shown, and Jen calculates the average of the numbers in the first three circles, the average of the numbers in the middle three circles, and the average of the numbers in the last three circles, and these three averages are equal?
Original LaTeX notation
What number is placed in the shaded circle if each of the numbers $1,5,6,7,13,14,17,22,26$ is placed in a different circle, the numbers 13 and 17 are placed as shown, and Jen calculates the average of the numbers in the first three circles, the average of the numbers in the middle three circles, and the average of the numbers in the last three circles, and these three averages are equal?

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