Of the coffee makers sold in an appliance store,6.0% have either a faulty switch or a defective cord,2.4% have a faulty switch,and 0.3% have both defects.What percent of the coffee makers will have a defective cord?
A)97.6%
B)6.0%
C)3.9%
D)6.3%
E)2.7%

Question

Quizplus · Accepted Answer

First, we need to find the percentage of coffee makers that have a defective switch only. This can be found by subtracting the percentage of coffee makers that have both defects (0.3%) from the percentage of coffee makers with a faulty switch (2.4% - 0.3% = 2.1%).

Then, we can subtract the total percentage of coffee makers with a faulty switch (2.4%) and those with both defects (0.3%) from the total percentage of coffee makers with at least one of the defects (6.0%) to find the percentage with only a defective cord:

6.0% - 2.4% - 0.3% = 3.3%

Therefore, the percent of coffee makers that will have a defective cord is 3.3%, which is closest to choice C, 3.9%.

Of the Coffee Makers Sold in an Appliance Store,6