MathematicsMedium89×since 2002Q5432If the standard deviation of the numbers 2, 3, a and 11 is 3.5, then which of the following is true?A3aaa² - 26aaa + 55 = 0B3aaa² - 32aaa + 84 = 0C3aaa² - 34aaa + 91 = 0D3aaa² - 23aaa + 44 = 0Check answerSkip