Question 2: Carbon monoxide detectors (CO detectors) are used to detect the presence of carbon monoxide gas in order to prevent carbon monoxide poisoning. California law requires all houses to be equipped with a CO detector, but not all houses comply. Of 40 houses in a particular neighborhood, 15 do not have a CO detector. If 10 houses from this neighborhood are selected at random for inspection, what is the probability that exactly 3 of the 10 do not have a CO detector