Answer:
Explanation:
To find the probability that Hanna draws a blue marble, we need to determine the ratio of the number of favorable outcomes (drawing a blue marble) to the total number of possible outcomes (drawing any marble).
The total number of marbles in the bag is the sum of the blue, green, and red marbles:
Total marbles = 15 blue marbles + 8 green marbles + 7 red marbles = 30 marbles
Since Hanna is drawing only one marble, the total number of possible outcomes is 30.
The number of favorable outcomes (drawing a blue marble) is 15 blue marbles.
Therefore, the probability that Hanna draws a blue marble is:
Probability = Number of favorable outcomes / Total number of possible outcomes
= 15 blue marbles / 30 marbles
= 0.5
So, the probability that Hanna draws a blue marble is 0.5 or 50%.