MathDB
statistics moment

Source: 2022 AMC 10A #8 / 2022 AMC 12A #6

November 11, 2022
2022 AMC2022 AMC 10a2022 AMC 12AAMC 10AMC 12AMCarithmetic mean

Problem Statement

A data set consists of 66 (not distinct) positive integers: 11, 77, 55, 22, 55, and XX. The average (arithmetic mean) of the 66 numbers equals a value in the data set. What is the sum of all positive values of XX?
<spanclass=latexbold>(A)</span>10<spanclass=latexbold>(B)</span>26<spanclass=latexbold>(C)</span>32<spanclass=latexbold>(D)</span>36<spanclass=latexbold>(E)</span>40<span class='latex-bold'>(A) </span> 10 \qquad <span class='latex-bold'>(B) </span> 26 \qquad <span class='latex-bold'>(C) </span> 32 \qquad <span class='latex-bold'>(D) </span> 36 \qquad <span class='latex-bold'>(E) </span> 40