First, we subtract the $300 he has saved already from the cost of the TV
That is; $1200 - $300 = $900
Since he saves $10 per week
To get the number of weeks it will take to save $900, divide $900 by $10
The result is 90 weeks
It will take him 90 weeks to save $900
But 52 weeks = 1 year
104 weeks = 2 years
This implies that; 90 weeks falls under 2 years
Therefore, It will take David 2 years to buy the TV
The correct option is C. 2 years