There are only blue cubes, yellow cubes and green cubes in a bag.

there are twice as many blue cubes as yellow cubes and seven times as many green cubes as blue cubes.

billy takes at random a cube from the bag.

work out the probability that billy takes a yellow cube. write in simplistic form.

( sorry if this question was already answered but i can't find it.)

Your answer is 1/7.

Step-by-step explanation:

Let's assume there is 1 yellow cube in the bag. Because there are 2X as many blue cubes that means there are 2 blue cubes. Because there are 4X as many green cubes (I believe cubes not balls) then that means there are 4 green cubes.

Therefore:

                1y + 2b + 4g = 7 total cubes

The probability that you pick out the yellow cube in 1 try would be #y/total amt = 1/7.

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points