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 Jun 15, 2017

Let the number of white cars =W

Let the number of black cars  =B

Let the number of red cars      =R


W/B =2/7

W/R =3/11

W + B + R =343, solve for W,B, R

W = 42 White cars

B = 147 Black cars

R = 154 Red cars

Guest Jun 15, 2017

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