Survey A statistician reported to his employer that he had gathered the following information: In a survey of 40 households in a certain tract, 36 households had a digital video disk (DVD) player, 36 had two cars, and 21 owned a camper, while 22 households had both a DVD player and two cars, 19 had a DVD player and a camper, and 17 had a camper and two cars. Six households had a DVD player, two cars, and a camper. The statistician was promptly fired by his employer. Why?
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