Final answer:
To find the percentage of red marbles, divide the number of red marbles by the total number of marbles and then multiply by 100%. The calculation gives us a result of 11.6%, which is option (a) is correct.
Step-by-step explanation:
To calculate the percentage of red marbles out of the total, we use the formula:
Percentage = (Number of red marbles / Total number of marbles) × 100%
Plugging in the numbers given:
Percentage = (65 / 560) × 100%
The calculation yields:
Percentage = 0.11607 × 100%
Percentage = 11.6%
Therefore, the correct answer is a. 11.6%.
To find the percentage of red marbles, we need to divide the number of red marbles by the total number of marbles and multiply by 100. In this case, there are 65 red marbles out of 560 marbles.
Percentage of red marbles = (65 / 560) * 100 = 11.6%
Therefore, the correct answer is a. 11.6%.