Correct Answer - Option 1 : 23

**Given:**

Average of 5 numbers in a group is 30

Average of the first two numbers is 35

Middle number is 34

**Concept used:**

Sum of all observations = Average × Total number of observations

**Calculation: **

Let the average of last two numbers be ‘x’

35 × 2 + 34 + x × 2= 30 × 5

⇒ 70 + 34 + 2x = 150

⇒ 2x = 46

⇒ x = 23

**∴ Average of last two numbers is 23**