Q2. A bag only contains red and blue counters.
It contains 24 red counters.
A counter is chosen at random from the bag.
1
The probability of choosing a blue counter is 4
-
How many counters are in the bag?

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.