Question

A bag contains 2 red, 4 blue, and 4 yellow marbles. What is the probability of pulling a red marble, putting the marble back, and then pulling a blue marble?

Answer 1

Red: 1/5 or 0.2 or 20% (depends if the question asked you to give the answer in fraction/decimal/percentage. Either way, it's still correct)

Black: 0

Blue: 2/5 or 0.4 or 40%

Explanation:

In total, the bag contains 10 balls,

• 2 are Red = 2/10 = 1/5

• There are no black marbles so you have 0 chance of pulling them out.

• 4 are blue = 4/10 = 2/5