Q: The ratio of blue cars to non-blue cars in the parking lot is 2:7. If there are 1260 cars in the parking lot, how many are blue?
Solution by hand:
Number of blue cars = 2x
Number of non-blue cars = 7x
2x + 7x = 1260
x = 140
There are 2x blue cars, so there are 280 blue cars.
Solution using my TI-84 Plus Program RATIO:
Total number of items = 1260
Number of categories of items = 2 (blue and non-blue)
Ratio part for category 1 (blue) = 2
Ratio part for category 2 (non-blue) = 7
Distribution is: blue = 280 and non-blue = 980.