Q: Last month, the ratio of sunny days to rainy days was 3:2. How many rainy days were there last month, if the month had 30 days? (Assume all days were either sunny or rainy.)
Solution by hand:
Number of sunny days = 3x
Number of rainy days = 2x
3x + 2x = 30
x = 6
There were 2x rainy days, so there were 12 rainy days.
Solution using my TI-84 Plus Program RATIO:
Total number of items (days) = 30
Number of categories of items = 2 (sunny and rainy)
Ratio part for category 1 (sunny) = 3
Ratio part for category 2 (rainy) = 2
Distribution is: sunny = 18 and rainy = 12.