Question

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.

Answer 1

1/17

Explanation:

If there is 1 yellow cube, then there are 2 blue cubes and 14 green cubes, for a total of 17 cubes. So the probability of a yellow cube is 1/17.