PrepTest 37, Section 1, Question 10
In a single day, exactly seven trucks�S, T, U, W, X, Y, and Z�are the only arrivals at a warehouse. No truck arrives at the same time as any other truck, and no truck arrives more than once that day. Each truck is either green or red (but not both). The following conditions apply:
In a single day, exactly seven trucks�S, T, U, W, X, Y, and Z�are the only arrivals at a warehouse. No truck arrives at the same time as any other truck, and no truck arrives more than once that day. Each truck is either green or red (but not both). The following conditions apply:
In a single day, exactly seven trucks�S, T, U, W, X, Y, and Z�are the only arrivals at a warehouse. No truck arrives at the same time as any other truck, and no truck arrives more than once that day. Each truck is either green or red (but not both). The following conditions apply:
In a single day, exactly seven trucks�S, T, U, W, X, Y, and Z�are the only arrivals at a warehouse. No truck arrives at the same time as any other truck, and no truck arrives more than once that day. Each truck is either green or red (but not both). The following conditions apply:
No two consecutive arrivals are red.
Y arrives at some time before both T and W.
Exactly two of the trucks that arrive before Y are red.
S is the sixth arrival.
Z arrives at some time before U.
For exactly how many of the seven trucks can one determine exactly how many trucks arrived before it?
one
two
three
four
five
Explanations
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