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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.)

Respuesta :

Answer:

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.

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