A ratio of white to black cars is 2:7 A ratio of white to red cars is 3:11. There is a total of 343 white red and black cars. How many black cars are there?

Guest Mar 27, 2023

#1**0 **

B==Black, W==White, R==Red

W / B ==2 / 7..........................................(1)

W / R ==3 / 11........................................(2)

B + W + R ==343....................................(3), solve for B, W, R

Use substitution to get:

**B ==147 - Number of black cars**

**W==42 - Number of white cars**

**R ==154 - Number of red cars**

Guest Mar 27, 2023