Correct Answer - Option 4 : 30 Years

**Given:**

The average age of the team is 28 years

The average age of 10 players except captain is 27.8 years

**Concept Used:**

Sum of age = Average of the age × Number of players

Number of players in a playing cricket team = 11

**Calculation:**

Sum of the age of all team member = 28 × 11 = 308 years

Sum of 10 players except captain = 27.8 × 10 = 278 years

Age of the captain = (308 - 278) = 30 years

**∴ The age of the captain is 30 years.**