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 the simplest form.

Answer 1

Answer:
`\bold{(1)/(19)}`

Explanation:

Yellow = y

Blue = 3y

Green = 5(3y) = 15y

Total = y + 3y + 15y = 19y

`\frac{\text{# of yellow cubes}}{\text{total number of cubes}}=(y)/(19y)=\large\boxed{(1)/(19)}`