Correct Answer - Option 1 : 10

**Given:**

Average of 25 numbers = 15

Average of first five numbers = 35

**Concept used:**

Average = Sum of observations/No. of observation

**Calculation:**

Let the average of remaining numbers be x, then

Sum of 25 numbers = Sum of first 5 numbers + Sum of remaining 20 numbers

⇒ (25 × 15) = (5 × 35) + 20x

⇒ 375 = 175 + 20x

⇒ 20x = 375 - 175

⇒ 20x = 200

⇒ x = 10

**∴**** The average of the remaining is 10.**