Question

There are only blue cubes, yellow cubes and green cubes in a bag.
There are
three times as many blue cubes as yellow cubes
and five times as many green cubes as blue cubes
Sarah takes at random a cube from the bag.

What is the probability that Sarah takes a yellow cube.
Give your answer in its simplest form.

please sensible answers​

Answer 1

Answer:

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