In a batch of 860 calculators, 9 were found to be defective. What is the probability that a calculator chosen at random will be defective? Write the probability as a percent. Round to the nearest whole number percent if necessary.
a. 1%
b. 10%
c. 3%
d. 7%
(9/860)×100
To find the probability that a calculator chosen at random will be defective, we need to divide the number of defective calculators by the total number of calculators and convert it to a percentage.
The number of defective calculators is given as 9, and the total number of calculators is 860.
Probability = (Number of defective calculators) / (Total number of calculators)
Probability = 9 / 860
Now, let's calculate the probability as a decimal:
Probability = 0.0104651
To convert this decimal to a percentage, we multiply it by 100:
Percentage = 0.0104651 * 100
Percentage = 1.04651
Rounded to the nearest whole number, the probability is approximately 1%.
Therefore, the answer is option a. 1%.
To find the probability that a calculator chosen at random will be defective, we need to divide the number of defective calculators by the total number of calculators in the batch and then multiply by 100 to convert the result to a percentage.
In this case, the number of defective calculators is given as 9, and the total number of calculators in the batch is 860.
The probability of choosing a defective calculator can be calculated as follows:
Probability of choosing a defective calculator = (Number of defective calculators) / (Total number of calculators) * 100
Probability of choosing a defective calculator = (9 / 860) * 100
Now, let's do the math:
Probability of choosing a defective calculator = 0.0105 * 100
Therefore, the probability of choosing a defective calculator is approximately 1%.
So, the correct answer is option a. 1%.