Question

1/7 of the cars in the parking lot were black,2/7 were red and the rest were white.what fraction of the cars were white?If the total number of cars were 210,How many cars were white.​

Answer 1

There were 120 white cars.

Step-by-step explanation:

Since we have given that

Fraction of cars were black = $\dfrac{1}{7}$

Fraction of cars were red = $\dfrac{2}{7}$

Fraction of cars were white is given by

$1-(\dfrac{1}{7}+\dfrac{2}{7})\\\\=1-\dfrac{3}{7}\\\\=\dfrac{4}{7}$

Total number of cars = 210

So, Number of cars were white is given by

$\dfrac{4}{7}\times 210\\\\=4\times 30\\\\=120$

Hence, there were 120 white cars.

# learn more:

1/7 of the cars in a parking lot were black, 2/7 where red and the rest were white. what fraction of the car were white? if the total number of cars was 210, how many cars were white?​

https://brainly.in/question/13223337

Answer 2

Answer:

4/7, 120

Step-by-step explanation:

No. of red cars = 210

No. of red cars = 1/7

= 1/7 × 210

we are reduce in lowest terms

210 ÷ 7 =30

30 × 1 =30

No. of Black car = 2/7

2/7 × 210

reduce in lowest terms

210 ÷ 7 = 30

30 × 2=60

So, the no. of white colours cars = 90

= 310 - ( 30 + 60 )

= 310 - 90

= 210 ans