Correct Answer - Option 1 : 5

**Given:**

X = (1, 3, 3, 7, 5, 0, 2, 9, 11, 8, 6)

**Formula Used:**

Arithmetic mean = Sum of terms/Number of terms

**Calculations:**

Number of terms = 11

Sum of terms = 1 + 3 + 3 + 7 + 5 + 0 + 2 + 9 + 11 + 8 + 6

⇒ Sum of terms = 55

Arithmetic mean = Sum of terms/Number of terms

⇒ Arithmetic mean = 55/11

⇒ Arithmetic mean = 5

**∴ The arithmetic mean of the given data is 5.**