Correct Answer - Option 3 : C

**Given:**

Ratio of three numbers = 2 : 3 : 6

HCF = 45

**Calculation:**

let the number be 2x, 3x, 6x

HCF is the common factor for all numbers

adding all the number = 2x + 3x + 6x = 11x

∵ both the x and HCF is common in all the number

Substituting the value of HCF in x

Sum of the three numbesr = 11 × 45 = 495

**∴ The sum of the three number is 495**