A store manager receives a delivery of 10 boxes of lightbulbs. Each box contains 20 lightbulbs. The store manager tests all the lightbulbs in one of the boxes and finds that 4 of them are defective.
Which statement about the lightbulbs in the remaining boxes is best supported by this information?
We can expect that there will be about 4 broken lightbulbs in each of the 10 boxes, which is 40 lightbulbs. This means between 25 and 50 lightbulbs will be defective.
