Which of the following describes periodic sampling?Group of answer choicesIt is a sampling method based on selecting every nth item from a population. It is a sampling method based solely on expert opinion. It is a sampling method based on selecting a time and then sampling the products after that time. It is a sampling method exclusively used for population that is divided into subsets.

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.