Question

Ed is doing a survey of popular colors for cars for a school report. He decides to take a sample by sitting near a busy intersection and noting the colors of the cars as they go by him. Ed counts 23 black cars, 9 red cars, 17 blue cars, 25 white cars, and 21 silver cars during 20 minutes of watching. How many more white and blue cars are there than silver and red cars?

Answer 1

Answer: There are 12 more white and blue cars than silver and red cars.

Explanation:

Since we have given that

During 20 minutes of watching, Ed noticed:

Number of black cars = 23

Number of red cars = 9

Number of blue cars = 17

Number of white cars = 25

Number of silver cars = 21

We need to find the number of white and blue cars are more than silver and red cars.

Total number of white and blue cars = 25+17=42

Total number of silver and red cars = 21+9 = 30

So, difference between them is 42-30 = 12

Thus, there are 12 more white and blue cars than silver and red cars.

Answer 2

Answer: There are 12 white and blue cars more than silver and red cars

Number of white cars: n1=25
Number of blue cars: n2=17
Number of white and blue cars: n3=n1+n2=25+17→n3=42

Number of silver cars: n4=21
Number of red cars: n5=9
Number of silver and red cars: n6=n4+n5=21+9→n6=30

How many more white and blue cars are there than silver and red cars?
n=?

n=n3-n6=42-30→n=12

Answer: There are 12 white and blue cars more than silver and red cars.