Question

Of the coffee makers sold in an appliance store, 4.0% have either a faulty switch or a defective cord, 2.5% have a faulty switch, and 0.1% have both defects. What is the probability that a coffee maker will have a defective cord? Express the answer as a percentage

Answer 1

All right, so 2.5% have a faulty switch. Out of these 2.5%, 0.1% also have a defective cord, which means that 2.4% ONLY have a faulty switch. Because 4.0% have either a defective cord or a faulty switch, 1.6% must then have a defective cord