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No dancer is in two consecutive numbers or in more than two numbers.
The first number in which Ed appears is one that comes before the first number in which Fran appears.
The second number in which Ed appears is one that comes after the second number in which Fran appears.
A duet consists of two men or two women or a woman and a man.
20. Which of the following is a complete and accurate list of those numbers that could be the last one in which Fran performs?
(A) Three
(B) Four
(C) Five
(D) Three, four
(E) Four, five
21. All of Maureen's appearances must be in duets if
(A) Fran is in number two
(B) Fran is in number five
(C) Ed is in number one
(D) Ed is in number two
(E) Ed is in number six
22. If Harry is in number five, number four must consist of
(A) two women
(B) two men
(C) Ed and a woman
(D) Maureen and a man
(E) Fran and a man
23. Under laws requiring the use of recyclable containers, beverages are sold only in containers that can be reused. Those who object to such laws point out that collecting reusable bottles requires gasoline, and washing them requires water; however, it takes less water to wash them than it does to make throwaway bottles. This saving in water exceeds the cost of the gasoline needed to transport empty bottles.
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