If the standard deviation of the numbers $2, 3, a$ and $11$ is $3.5$, then which of the following is true? (1) $3a^2 - 26a + 55 = 0$ (2) $3a^2 - 32a + 84 = 0$ (3) $3a^2 - 34a + 91 = 0$ (4) $3a^2 - 23a + 44 = 0$
If the standard deviation of the numbers $2, 3, a$ and $11$ is $3.5$, then which of the following is true?
(1) $3a^2 - 26a + 55 = 0$
(2) $3a^2 - 32a + 84 = 0$
(3) $3a^2 - 34a + 91 = 0$
(4) $3a^2 - 23a + 44 = 0$