Question

You choose a marble at random from a bag containing 12 red, 12 blue, 15 green, 9 yellow, and 12 black marbles.

Write the probability of the marble is red: as a fraction
as a decimal
and as a percent

Answer 1

You add the marbles together for the denominator.

So 60 marbles altogether. 12/60. This simplifies down to 1/5. Hope this helps.