The average of squares of first 11 consecutive even numbers is:  Choose the correct choice from the following options:  A) 164  B) 174  C) 184  D) 194  E) 204

Rationale: 2 ( n + 1 ) ( 2 n + 1 ) / 3 ( 2 * 12 * 23 ) / 3 = 2 * 4 * 23 = 184 answer : c
Answer: C