Question

Urgent! Please answer! Will give Brainliest if correct!

White shapes and black shapes are used in a game.
Some of the shapes are circles.
All the other shapes are squares.
The ratio of the number of white shapes to the number of black shapes is 7:3
The ratio of the number ofwhite circles to the number of white squares is 2:7
The ratio of the number of black circles to the number of black squares is 1:2
Work out what fraction of all the shapes are circles.
Give your answer as a fraction in its simplest form.

Answer 1

Answer:

4/15 of the shapes are circles.

Step-by-step explanation:

I'm not sure, but I believe 4/15 of the shapes are circles.

Answer 2

Answer:

23/90

Step-by-step explanation:

The ratio of the number of white shapes to the number of black shapes is 7:3

7 + 3 = 10

10 total parts

7 white parts

3 black parts

The ratio of the number of white circles to the number of white squares is 2:7

2 + 7 = 9

2/9 of the 7 white parts are white circles

white circle parts  = 2/9 * 7 = 14/9

The ratio of the number of black circles to the number of black squares is 1:2

1 + 2 = 3

1/3 of the 3 black parts are black circles

black circles parts = 1/3 * 3 = 1

Total circle parts

14/9 + 1 = 23/9

Fraction of circle parts to total parts

(23/9) / 10 = 23/90

23/90