Option 2 : 6.5

**Concept used:**

**Composite number:- **A composite number is a natural number or a positive integer which has more than two factors.

Ex 4, 6, 8 etc

4 is the smallest composite number

**Prime number =** It is the number that has only two factors, one and itself

Ex:- 2, 3, 5, 7, 11 etc

Average = Sum of all the terms/Total number of terms

**Calculation:**

First 5 composite number = 4, 6, 8, 9, 10

First 5 prime number = 2, 3, 5, 7, 11

Sum = 4 + 6 + 8 + 9 + 10 + 2 + 3 + 5 + 7 + 11 = 65

Total number of terms = 10

Average = Sum of all the terms/Total number of terms

⇒ 65/10 = 6.5

**∴ The required average is 6.5**