A bag contains 7 blue marbles, 5 red marbles, and 9 green marbles. A marble is taken at random from the bag. What is the probability that the marble is blue or red?
Please check my answer 12/21
its right but simplify it and you get 4/7 that's the answer
good job
I agree with Jen's answer, it is 12/21 or 4/7
A marble is randomly selected from a box containing 5 green,3 red and 7 blue marble?
To find the probability that the marble is blue or red, we need to determine the number of blue and red marbles.
In this case, there are 7 blue marbles and 5 red marbles. So the total number of blue and red marbles is 7 + 5 = 12.
The bag contains a total of 7 + 5 + 9 = 21 marbles.
To find the probability, we divide the number of favorable outcomes (marbles that are blue or red) by the total number of possible outcomes (total number of marbles).
Therefore, the probability of picking a blue or red marble from the bag is 12/21.
So your answer of 12/21 is correct.