Abag contains 12 red marbles, 5 yellow marbles, and 15 green marbles. how many additional red marbles must be added to the 32 marbles already in the bag so that the probability of randomly drawing a red marble is ?

18 red marbles.

Step-by-step explanation:

The complete question asks the probability of randomly drawing a red marble is 3/5?

Let x be the number of red marbles that must be added.

To find x we will do the following:

=>

=>

=>

This gives x = 18

Hence, 18 red marbles will be added to the bag.

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