In a batch of 280 water purifiers, 12 were found to be defective. What is the probability that a water purifier chosen at random will be defective? Write the probability as a percent. Round to the nearest whole number percent if necessary.
12/280 = ?
10
To find the probability that a water purifier chosen at random will be defective, we need to divide the number of defective water purifiers by the total number of water purifiers.
Number of defective water purifiers = 12
Total number of water purifiers = 280
Probability of selecting a defective water purifier = Number of defective water purifiers / Total number of water purifiers
= 12 / 280
≈ 0.042857
To convert the probability to a percent, we multiply by 100:
Probability (in decimal form) * 100 = 0.042857 * 100
≈ 4.29
Rounding to the nearest whole number percent, the probability that a water purifier chosen at random will be defective is approximately 4%.
To find the probability that a water purifier chosen at random will be defective, we need to divide the number of defective water purifiers by the total number of water purifiers.
In this case, there were 12 defective water purifiers out of a total of 280. So, the probability can be calculated as follows:
Probability = (Number of defective water purifiers) / (Total number of water purifiers)
Probability = 12 / 280
To express the probability as a percent, multiply the probability by 100:
Probability (in percent) = (12 / 280) * 100
Calculating this, we find:
Probability (in percent) = 4.29%
Therefore, the probability that a water purifier chosen at random will be defective is approximately 4.29%.