Hi All,
We're told that in the Johnsons' monthly budget, the dollar amounts allocated to household expenses, food, and miscellaneous items are in the ratio 5:2:1, respectively and that the total amount allocated to these three categories is $1,800. We're asked for the amount allocated to food. This is a standard ratio question and the 'math' behind it can be done in a variety of ways (depending on how you "see" the relationships involved).
To start, with a ratio of 5:2:1, it's highly likely that....
The amount spent on household expenses is a multiple of $5
The amount spent on food is a multiple of $2
The amount spent on miscellaneous items is a multiple of $1
The TOTAL spent will be a multiple of $5+$2+1 = $8
This means that for every $8 that is spent $2 will be on food. $2/$8 = 1/4, so 1/4 of the $1800 total will be spent on food.
(1/4)($1800) = $450
Final Answer: D
GMAT assassins aren't born, they're made,
Rich