Question

a certain parking lot has only green cars and black cars.

• there are 50 cars in a certain parking lot.
• there are 2 green cars for every 3 black cars.

how many of the cars are green?

Explanation:

Step1: Determine the total parts of the ratio

The ratio of green cars to black cars is \(2:3\). So the total number of parts in the ratio is \(2 + 3=5\) parts.

Step2: Find the value of one part

There are a total of 50 cars. Since the total number of parts is 5, the value of one part is \(\frac{50}{5} = 10\) cars per part.

Step3: Calculate the number of green cars

The number of green cars is represented by 2 parts in the ratio. So the number of green cars is \(2\times10 = 20\) cars.

Answer:

20